fix: Adds ReadType/Write(Type) and improves type referencing (#1172)

## Changes
* Improves type hashing by introducing xxHash3 (64bit)
* Removes individual `tdb` files in favor of a single `SerializedTypes.db` file. This file is only used to identify a type that is being deserialized, which doesn't exist.
* Adds duplicate type alias detection
* Adds `AssemblyHandler.FindTypeByHash`

View changed files whitespaces: https://github.com/modernuo/ModernUO/pull/1172/files?diff=split&w=1

## SerializedTypes.db
The serialized types file is used to get back the original name of a type in case it no longer exists in code. This can easily be necessary if a class is renamed in code and no `TypeAlias` is provided.

### Format
byte[4] - version
byte[4] - count
--array--
byte[8] - xxHash
byte[1] - flag, 0 - null, 1 - not null
byte[n] - Full class name in UTF8

### Example
<img width="472" alt="SerializedTypes_Example" src="https://user-images.githubusercontent.com/3953314/195255429-31d24293-6bd1-419e-811b-07874dd0f78d.png">

## Benchmarks
Serialized 500 Type fields. The 8192bytes comes from the _ConcurrentQueue_ that would later be used for SerializedTypes.
Note that the queue is never cleared, so it's size grew considerably.
```cs
|               Method |     Mean |    Error |   StdDev | Allocated |
|--------------------- |---------:|---------:|---------:|----------:|
|      BenchmarkXXHash | 18.44 us | 0.278 us | 0.260 us |    8192 B |
| BenchmarkTypeStrings | 25.09 us | 0.292 us | 0.259 us |         - |
```

TODO:
* Add support in the Serialization Generator for `ReadType()` and `Write(Type)`
* Remove `SetTypeRef` from Serialization Generator

version.json

@@ -1,4 +1,4 @@
 {
   "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "0.9.3"
+  "version": "0.9.4"
 }