chore: fix master→main refs in CI, CONTRIBUTING, README + ignore .next-dev

Author: dotsystemsdevs

.github/CONTRIBUTING.md

@@ -42,7 +42,7 @@ npm run build
 1. Fork repo
 2. Create feature branch (`feat/...`, `fix/...`, `docs/...`, `chore/...`)
 3. Commit with clear message
-4. Open PR to `master`
+4. Open PR to `main`
 
 ## Issue hygiene
 

.github/workflows/ci.yml

@@ -2,9 +2,9 @@ name: CI
 
 on:
   pull_request:
-    branches: [master]
+    branches: [main]
   push:
-    branches: [master]
+    branches: [main]
 
 jobs:
   validate:

.gitignore

@@ -11,6 +11,7 @@
 
 # next.js
 /.next/
+/.next-dev/
 /out/
 
 # production