chore: ratatui 0.30 maintenance + collaboration baseline (#1)

.github/branch-protection-main.json

@@ -0,0 +1,25 @@
+{
+  "required_status_checks": {
+    "strict": true,
+    "contexts": [
+      "cargo fmt --check",
+      "cargo clippy -- -D warnings",
+      "cargo check",
+      "cargo test"
+    ]
+  },
+  "enforce_admins": true,
+  "required_pull_request_reviews": {
+    "dismiss_stale_reviews": true,
+    "required_approving_review_count": 1,
+    "require_code_owner_reviews": false
+  },
+  "restrictions": null,
+  "required_conversation_resolution": true,
+  "allow_force_pushes": false,
+  "allow_deletions": false,
+  "block_creations": false,
+  "required_linear_history": false,
+  "lock_branch": false,
+  "allow_fork_syncing": true
+}