chore: Rename SUPABASE_PUBLISHABLE_OR_ANON_KEY to SUPABASE_PUBLISHABLE_KEY for all blocks (#42652)

This PR renames all `SUPABASE_PUBLISHABLE_OR_ANON_KEY` env vars into
`SUPABASE_PUBLISHABLE_KEY` to make the new API keys default. This is in
coordination with the rest of the docs.

I've also cleaned up the `blocks/vue` package from unused files.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Breaking Changes**
* Public environment variable names renamed from PUBLISHABLE_OR_ANON_KEY
→ PUBLISHABLE_KEY across all framework integrations; update your
environment configs.

* **Documentation**
* All framework guides, .env examples and registry docs updated to use
the new variable names.

* **Chores**
* Cleaned up UI registry/templates: some example Vue registry items and
autogenerated registry artifacts were removed or simplified.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

package.json

@@ -22,8 +22,8 @@
     "dev:design-system": "turbo run dev --filter=design-system --parallel",
     "lint": "turbo run lint",
     "typecheck": "turbo --continue typecheck",
-    "test:prettier": "SORT_IMPORTS=false prettier --cache --check '{apps,packages}/**/*.{js,jsx,ts,tsx,css,md,json}'",
-    "format": "SORT_IMPORTS=false prettier --cache --write '{apps,packages}/**/*.{js,jsx,ts,tsx,css,md,mdx,json}'",
+    "test:prettier": "SORT_IMPORTS=false prettier --cache --check '{apps,packages,blocks}/**/*.{js,jsx,ts,tsx,css,md,json}'",
+    "format": "SORT_IMPORTS=false prettier --cache --write '{apps,packages,blocks}/**/*.{js,jsx,ts,tsx,css,md,mdx,json}'",
     "test:docs": "turbo run test --filter=docs",
     "test:ui": "turbo run test --filter=ui",
     "test:ui-patterns": "turbo run test --filter=ui-patterns",