Swarm (#36)

* make azalea-pathfinder dir

* start writing d* lite impl

* more work on d* lite

* work more on implementing d* lite

* full d* lite impl

* updated edges

* add next() function

* add NoPathError

* why does dstar lite not work

* fix d* lite implementation

* make the test actually check the coords

* replace while loop with if statement

* fix clippy complaints

* make W only have to be PartialOrd

* fix PartialOrd issues

* implement mtd* lite

* add a test to mtd* lite

* remove normal d* lite

* make heuristic only take in one arg

* add `success` function

* Update README.md

* evil black magic to make .entity not need dimension

* start adding moves

* slightly improve the vec3/position situation

new macro that implements all the useful functions

* moves stuff

* make it compile

* update deps in az-pathfinder

* make it compile again

* more pathfinding stuff

* add Bot::look_at

* replace EntityMut and EntityRef with just Entity

* block pos pathfinding stuff

* rename movedirection to walkdirection

* execute path every tick

* advance path

* change az-pf version

* make azalea_client keep plugin state

* fix Plugins::get

* why does it think there is air

* start debugging incorrect air

* update some From methods to use rem_euclid

* start adding swarm

* fix deadlock

i still don't understand why it was happening but the solution was to keep the Client::player lock for shorter so it didn't overlap with the Client::dimension lock

* make lookat actually work probably

* fix going too fast

* Update main.rs

* make a thing immutable

* direction_looking_at

* fix rotations

* import swarm in an example

* fix stuff from merge

* remove azalea_pathfinder import

* delete azalea-pathfinder crate

already in azalea::pathfinder module

* swarms

* start working on shared dimensions

* Shared worlds work

* start adding Swarm::add_account

* add_account works

* change "client" to "bot" in some places

* Fix issues from merge

* Update world.rs

* add SwarmEvent::Disconnect(Account)

* almost add SwarmEvent::Chat and new plugin system

it panics rn

* make plugins have to provide the State associated type

* improve comments

* make fn build slightly cleaner

* fix SwarmEvent::Chat

* change a println in bot/main.rs

* Client::shutdown -> disconnect

* polish

fix clippy warnings + improve some docs a bit

* fix shared worlds*

*there's a bug that entities and bots will have their positions exaggerated because the relative movement packet is applied for every entity once per bot

* i am being trolled by rust

for some reason some stuff is really slow for literally no reason and it makes no sense i am going insane

* make world an RwLock again

* remove debug messages

* fix skipping event ticks

unfortunately now sending events is `.send().await?` instead of just `.send()`

* fix deadlock + warnings

* turns out my floor_mod impl was wrong

and i32::rem_euclid has the correct behavior LOL

* still errors with lots of bots

* make swarm iter & fix new chunks not loading

* improve docs

* start fixing tests

* fix all the tests

except the examples i don't know how to exclude them from the tests

* improve docs some more

4 files changed, 11 insertions, 3 deletions

diff --git a/azalea-physics/Cargo.toml b/azalea-physics/Cargo.toml
index 7619db80..7619db80 100755..100644
--- a/azalea-physics/Cargo.toml
+++ b/azalea-physics/Cargo.toml
diff --git a/azalea-physics/src/collision/mod.rs b/azalea-physics/src/collision/mod.rs
index 7fb2cf97..7fb2cf97 100755..100644
--- a/azalea-physics/src/collision/mod.rs
+++ b/azalea-physics/src/collision/mod.rs
diff --git a/azalea-physics/src/collision/world_collisions.rs b/azalea-physics/src/collision/world_collisions.rs
index 65f7f5bb..a4062fcc 100644
--- a/azalea-physics/src/collision/world_collisions.rs
+++ b/azalea-physics/src/collision/world_collisions.rs
@@ -57,7 +57,7 @@ impl<'a> BlockCollisions<'a> {
         }
     }
 
-    fn get_chunk(&self, block_x: i32, block_z: i32) -> Option<&Arc<Mutex<Chunk>>> {
+    fn get_chunk(&self, block_x: i32, block_z: i32) -> Option<Arc<Mutex<Chunk>>> {
         let chunk_x = ChunkSectionPos::block_to_section_coord(block_x);
         let chunk_z = ChunkSectionPos::block_to_section_coord(block_z);
         let chunk_pos = ChunkPos::new(chunk_x, chunk_z);
@@ -75,7 +75,7 @@ impl<'a> BlockCollisions<'a> {
         //    return var7;
         // }
 
-        self.world[&chunk_pos].as_ref()
+        self.world.get_chunk(&chunk_pos)
     }
 }
 
diff --git a/azalea-physics/src/lib.rs b/azalea-physics/src/lib.rs
index 2295e6f2..34d31a0e 100755..100644
--- a/azalea-physics/src/lib.rs
+++ b/azalea-physics/src/lib.rs
@@ -231,7 +231,10 @@ fn jump_boost_power<D: DerefMut<Target = World>>(_entity: &Entity<D>) -> f64 {
 mod tests {
     use super::*;
     use azalea_core::ChunkPos;
-    use azalea_world::{Chunk, World};
+    use azalea_world::{
+        entity::{metadata, EntityMetadata},
+        Chunk, World,
+    };
     use uuid::Uuid;
 
     #[test]
@@ -247,6 +250,7 @@ mod tests {
                     y: 70.,
                     z: 0.,
                 },
+                EntityMetadata::Player(metadata::Player::default()),
             ),
         );
         let mut entity = world.entity_mut(0).unwrap();
@@ -279,6 +283,7 @@ mod tests {
                     y: 70.,
                     z: 0.5,
                 },
+                EntityMetadata::Player(metadata::Player::default()),
             ),
         );
         let block_state = world.set_block_state(&BlockPos { x: 0, y: 69, z: 0 }, BlockState::Stone);
@@ -311,6 +316,7 @@ mod tests {
                     y: 71.,
                     z: 0.5,
                 },
+                EntityMetadata::Player(metadata::Player::default()),
             ),
         );
         let block_state = world.set_block_state(
@@ -344,6 +350,7 @@ mod tests {
                     y: 71.,
                     z: 0.5,
                 },
+                EntityMetadata::Player(metadata::Player::default()),
             ),
         );
         let block_state = world.set_block_state(
@@ -377,6 +384,7 @@ mod tests {
                     y: 73.,
                     z: 0.5,
                 },
+                EntityMetadata::Player(metadata::Player::default()),
             ),
         );
         let block_state = world.set_block_state(