Refactor and update database configurations

Updated GitHub Actions workflows to include a new solution path `./ThingsLibrary.Frameworks.slnx`. Removed `.editorconfig`, eliminating specific code style rules. Removed `DataContext.cs` and `DatabaseExtensions.cs` for Cosmos and Mongo, indicating a refactor. Updated project files for Cosmos and MongoDB with new titles and descriptions, and upgraded MongoDB driver. Replaced `ThingsLibrary.Frameworks.sln` with `ThingsLibrary.Frameworks.slnx`. Added new `ServiceCollection.cs` files for database extensions and a `ServiceProvider.cs` for database initialization. Updated project files for Postgres and SQL Server with new metadata and descriptions. Changed namespace in `AppService.cs` for project reorganization.

Author: Lanning, Mark

.github/workflows/publish_nugets.yml

@@ -18,7 +18,7 @@ jobs:
       id-token: write
 
     env:      
-      SOLUTION_PATH: './ThingsLibrary.Frameworks.sln'
+      SOLUTION_PATH: './ThingsLibrary.Frameworks.slnx'
 
     steps:    
     - name: Checkout

.github/workflows/pull_requests.yml

@@ -17,7 +17,7 @@ jobs:
     timeout-minutes: 15
 
     env:      
-      SOLUTION_PATH: './ThingsLibrary.Frameworks.sln'
+      SOLUTION_PATH: './ThingsLibrary.Frameworks.slnx'
 
     steps:    
     - name: Checkout