chore: clean up docs, add push workflow

.github/workflows/pr-build-check.yml

@@ -2,15 +2,7 @@ name: PR Build Check
 
 on:
   pull_request:
-    branches: [main, develop]
-    paths:
-      - "src/**"
-      - "examples/**"
-      - "variants/**"
-      - "platformio.ini"
-      - ".github/workflows/pr-build-check.yml"
-  push:
-    branches: [develop]
+    branches: [main]
     paths:
       - "src/**"
       - "examples/**"