Refactor schema and test data; remove DAL code

Removed all DataAccessLayer C# code and related test project files. Updated schema.sql to add Country, StateProvince, and City tables, refactored brewery and beer post tables to include location and concurrency columns, and replaced the old comment/rating system with BeerPostComment. Updated test-data.sql to seed new location tables and refactored brewery data to use city and coordinates.

.config/dotnet-tools.json

@@ -0,0 +1,13 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "csharpier": {
+      "version": "1.1.2",
+      "commands": [
+        "csharpier"
+      ],
+      "rollForward": false
+    }
+  }
+}