feat: Adds .NET 7 & Arm64 support (#1229)

## BREAKING CHANGE
**Publishing for linux will no longer include runtimes**

## Major Changes
* Adds .NET 7 support.
* Adds ARM64 support (experimental).
* Changes linux support to be open-ended against anything .NET 7 supports.
* Fixes native library resolutions. (Make sure to install `dev` versions of the libraries)
* Updates README
* Adds Ubuntu 22, CentOS 8/9 Stream to CI/CD.

## TODOs:
* Update modernuo.com docs

Closes #1173
Closes #1159

docs/starting-server.md

@@ -0,0 +1,22 @@
+---
+title: Starting the server
+---
+
+# Starting the server
+
+Now that the software has been built, all you need to do is run it!
+Everything is run from the _Distribution_ folder.
+
+=== "Windows"
+    Using _windows terminal_, _git bash_, or _powershell_, run:
+    ```bash
+    cd Distribution
+    ModernUO.exe
+    ```
+
+=== "OSX/Linux"
+    Using _terminal_, run:
+    ```bash
+    cd Distribution
+    dotnet run ModernUO.dll
+    ```