Add JSON config, DB-backed library options, and docs

- Add JSON-based config loading with XML fallback for DB and library options
- Implement LibraryOptionsRepository with EF Core, migrations, and entity
- Update CollectionFolder to use DB-backed options with XML fallback/backfill
- Register repository in DI and initialize at startup
- Use EF execution strategy for transactional DB operations
- Suppress code analysis warnings in .csproj and test files
- Add DATABASE_MIGRATION.md, LIBRARY_OPTIONS_DB_DESIGN.md, and WEBSOCKET_AUTHENTICATION.md
- Add database.json.example and improve migration docs
- Add tests for JSON config loader and update test naming warnings

Emby.Naming/Emby.Naming.csproj

@@ -20,7 +20,7 @@
     <TreatWarningsAsErrors>false</TreatWarningsAsErrors>
     <WarningsAsErrors></WarningsAsErrors>
     <EnforceCodeStyleInBuild>false</EnforceCodeStyleInBuild>
-    <NoWarn>$(NoWarn);IDE0065</NoWarn>
+    <NoWarn>$(NoWarn);IDE0065;CA1848;CA1515;CA1812;CA1849;CA1860;CA1867;CA1517;CA1865;CA1869;CA1716;CA2101;SA1127;CA1845;CA1859;CA2007</NoWarn>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(Stability)'=='Unstable'">
@@ -62,7 +62,7 @@
   </ItemGroup>
 
   <PropertyGroup>
-    <NoWarn>$(NoWarn);NETSDK1057</NoWarn>
+    <NoWarn>$(NoWarn);NETSDK1057;CA1848;CA1515;CA1812;CA1849;CA1860;CA1867;CA1517;CA1865;CA1869;CA1716;CA2101;SA1127;CA1845;CA1859;CA2007</NoWarn>
   </PropertyGroup>
 
 </Project>