Do not run CI for commits (except main), allow to run manually if needed

Author: nazar-pc

.github/workflows/rust.yaml

@@ -2,13 +2,16 @@ name: Rust
 
 on:
   push:
+    branches:
+      - main
     paths-ignore:
       - '**.md'
       - '.github/CODEOWNERS'
   pull_request:
     paths-ignore:
       - '**.md'
       - '.github/CODEOWNERS'
+  workflow_dispatch:
 
 env:
   # Not needed in CI, should make things a bit faster