Move to .NET 9, remove all traces of Unity

.editorconfig

@@ -7,6 +7,11 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
+[*.csproj]
+indent_size = 2
+[*.props]
+indent_size = 2
+
 [*.md]
 indent_style = space
 indent_size = 2

.github/workflows/dotnet.yml

@@ -0,0 +1,36 @@
+# This workflow will build a .NET project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-net
+
+name: .NET
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-22.04
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: 9.0.x
+
+    - name: Restore dependencies
+      run: dotnet restore
+
+    - name: Build
+      run: dotnet build --no-restore -m:1
+
+    - name: Pack
+      run: dotnet pack --configuration Debug
+
+    - name: Push
+      run: dotnet nuget push src/**/*.nupkg --api-key ${{ secrets.NUGET_KEY }} --source https://api.nuget.org/v3/index.json
+

.gitignore

@@ -0,0 +1,34 @@
+# Common IntelliJ Platform excludes
+
+# User specific
+**/.idea/**/workspace.xml
+**/.idea/**/tasks.xml
+**/.idea/shelf/*
+**/.idea/dictionaries
+**/.idea/httpRequests/
+
+# Sensitive or high-churn files
+**/.idea/**/dataSources/
+**/.idea/**/dataSources.ids
+**/.idea/**/dataSources.xml
+**/.idea/**/dataSources.local.xml
+**/.idea/**/sqlDataSources.xml
+**/.idea/**/dynamic.xml
+
+# Rider
+# Rider auto-generates .iml files, and contentModel.xml
+**/.idea/**/*.iml
+**/.idea/**/contentModel.xml
+**/.idea/**/modules.xml
+
+*.suo
+*.user
+.vs/
+[Bb]in/
+[Oo]bj/
+_UpgradeReport_Files/
+[Pp]ackages/
+
+Thumbs.db
+Desktop.ini
+.DS_Store