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

azure-pipelines.yml

@@ -15,41 +15,10 @@ jobs:
 
   steps:
   - task: UseDotNet@2
-    displayName: 'Install .NET 6'
+    displayName: 'Install .NET 7'
     inputs:
       packageType: sdk
-      version: 6.0.402
-  - task: NuGetAuthenticate@1
-  - script: ./publish.cmd Release
-    displayName: 'Build'
-  - script: dotnet test --no-restore
-    displayName: 'Test'
-
-- job: BuildLinux
-  strategy:
-    matrix:
-      'CentOS 8':
-        containerImage: centos:8
-      'CentOS 7':
-        containerImage: centos:7
-      'Debian 11':
-        containerImage: mcr.microsoft.com/dotnet/sdk:6.0-bullseye-slim
-      'Ubuntu 20':
-        containerImage: mcr.microsoft.com/dotnet/sdk:6.0-focal
-
-  displayName: Linux
-
-  pool:
-    vmImage: 'ubuntu-latest'
-
-  container: $[ variables['containerImage'] ]
-
-  steps:
-  - task: UseDotNet@2
-    displayName: 'Install .NET 6'
-    inputs:
-      packageType: sdk
-      version: 6.0.402
+      version: 7.0.100-rc.2.22477.23
   - task: NuGetAuthenticate@1
   - script: ./publish.cmd Release
     displayName: 'Build'