feat: migrate hosting to Cloudflare Pages via git.ampbox.io

- Update site URL to https://crashtestdev.com, remove /crashtestdev base path
- Add Gitea Actions workflow for Cloudflare Pages deployment
- Remove GitHub Actions workflows (GitHub Pages + legacy Azure SWA)
- Update tests to match new site config

🤖 Generated with [Amplifier](https://github.com/microsoft/amplifier)

Co-Authored-By: Amplifier <240397093+microsoft-amplifier@users.noreply.github.com>

tests/shiki-theme.test.mjs

@@ -138,9 +138,8 @@ describe('workbenchTheme in astro.config.mjs', () => {
     assert.equal(tc.settings.foreground, '#A0522D');
   });
 
-  it('should preserve site and base config', () => {
-    assert.equal(config.site, 'https://kenotron.github.io');
-    assert.equal(config.base, '/crashtestdev');
+  it('should preserve site config', () => {
+    assert.equal(config.site, 'https://crashtestdev.com');
   });
 
   it('should include mdx integration', () => {