chore: add commit message convention guidelines for monorepo

.cursor/rules/commit-message-convention.mdc

@@ -0,0 +1,25 @@
+---
+description: Monorepo conventional commit message format
+alwaysApply: true
+---
+
+# Commit Message Convention
+
+Use monorepo-style conventional commit messages for all git commits.
+
+## Format
+
+`type(scope): subject`
+
+- `type` is a conventional commit type like `feat`, `fix`, `chore`, `docs`, `refactor`, or `test`.
+- `scope` should identify the monorepo package or area (for example `lotato`, `lo-star`, `meshtastic`).
+- `subject` must be concise, imperative, and lowercase when possible.
+
+## Limits
+
+- Keep the full commit subject line to **50 characters or fewer**.
+
+## Examples
+
+- `feat(lotato): add meshcore cli gateway`
+- `fix(lo-star): correct readme typo`