feat(region): Add admin region get + list endpoints (#6322)

**What**
Add `GET /admin/regions`
Add `GET /admin/regions/:id`

Blocked by #6320 

Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>

packages/utils/src/common/alter-columns-helper.ts

@@ -0,0 +1,32 @@
+export function generatePostgresAlterColummnIfExistStatement(
+  tableName: string,
+  columns: string[],
+  alterExpression: string
+) {
+  let script = `
+    DO $$
+    DECLARE
+        current_column text;
+    BEGIN`
+
+  columns.forEach((column) => {
+    script += `
+        current_column := '${column}';
+        IF EXISTS (
+            SELECT 1 
+            FROM information_schema.columns 
+            WHERE table_name = '${tableName}' 
+            AND column_name = current_column
+        ) THEN
+            EXECUTE format('ALTER TABLE %I ALTER COLUMN %I ${alterExpression}', '${tableName}', current_column);
+        ELSE
+            RAISE NOTICE 'Column % does not exist or alteration condition not met.', current_column;
+        END IF;`
+  })
+
+  script += `
+    END$$;
+    `
+
+  return script
+}

packages/utils/src/common/index.ts

@@ -1,3 +1,4 @@
+export * from "./alter-columns-helper"
 export * from "./array-difference"
 export * from "./build-query"
 export * from "./camel-to-snake-case"
@@ -45,3 +46,4 @@ export * from "./to-pascal-case"
 export * from "./transaction"
 export * from "./upper-case-first"
 export * from "./wrap-handler"
+