Add migration scripts and preload participation awards script

- Created migration index file to manage database migrations.
- Added script to preload participation awards and related blog posts into the CMS.
- Introduced new types and default data for application phases.
- Added award articles data structure for the upcoming awards.

src/migrations/index.ts

@@ -0,0 +1,15 @@
+import * as migration_20260630_133242 from './20260630_133242';
+import * as migration_20260630_165002_participation_awards_grid from './20260630_165002_participation_awards_grid';
+
+export const migrations = [
+  {
+    up: migration_20260630_133242.up,
+    down: migration_20260630_133242.down,
+    name: '20260630_133242',
+  },
+  {
+    up: migration_20260630_165002_participation_awards_grid.up,
+    down: migration_20260630_165002_participation_awards_grid.down,
+    name: '20260630_165002_participation_awards_grid'
+  },
+];