ci: revamp app build workflow, introduce a new one for release deployment (#3921)

* feat(ci): clean up app release build workflow, set app versions to match tag's

* feat(ci): rename Theseus build workflow, add new release workflow

* chore(ci): minor tweaks to `theseus-build` workflow

* chore: update workflow reference in comments

apps/app-frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@modrinth/app-frontend",
   "private": true,
-  "version": "0.10.1",
+  "version": "1.0.0-local",
   "type": "module",
   "scripts": {
     "dev": "vite",