* Adds ISpanFormattable to geometry structs and makes ToString() near-zero-allocation.
* Adds IEquatable, and Parsable to Rectangle3D to get it in-line with the other structs.
Closes#1067
## Added Feature
Adds a single threaded array pool that works exactly the same as `ArrayPool<T>.Shared`.
The `STArrayPool<T>.Shared` can only be used on a single thread, the main game thread of the server.
Note: Unlike the built-in array pool, there is no hook into the _GC Gen 2_. This means to relieve potentially high memory pressure, `ArrayPool<T>.Shared.Trim()` must be called. The pool will only release arrays _after two successive calls within 10 seconds or longer_. If the server is at less than 70% total memory usage, or the server is not going to use this pool for something egregious, then don't bother ever calling Trim().
## Changes
- [X] Fixes ArrayPool calls that should be cleared due to references.
- [X] Benchmarks against ArrayPool with 4+ rented arrays deep of the same length.
- [x] Unit tests
- [X] Removes static freezing/unfreezing. Use other tools for this.
- [X] Cleans up IPoint3D allocations
- [X] Removes IPoint3D constructors since the compiler may not optimize the constructor path and allow allocations.
Note: Instead of `new Point3D(m)`, do something like `new Point3D(m.Location)`. Sorry for the inconvenience. In the long run this will prevent abuse of hot paths that will cause performance issues.
* Removes FastMovementImpl since it isn't used and I am not convinced it is better.
* Moves some of the new movement logic from FastMovementImpl to MovementImpl
* Makes MovementImpl more readable
- [X] Moves map definitions to a `map-definitions.json` file.
- [X] Creates a TileMatrixLoader.
- [X] Moves tile matrix and multi data configurations closer to their classes.
