docs: needs approval label (#12177)

Our CI workflow doesn't allow merging for only .md changes because the required check doesn't clear based on file filters.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -47,3 +47,9 @@ assignees: ""
 -->
 
 (Share it here.)
+
+---
+##### House rules
+- If this issue has a `🚨 needs approval` label, don't start coding yet. Wait until a core member approves feature request by removing this label, then you can start coding.
+  - For clarity: Non-core member issues automatically get the `🚨 needs approval` label.
+  - Your feature ideas are invaluable to us! However, they undergo review to ensure alignment with the product's direction.

.github/PULL_REQUEST_TEMPLATE.md

@@ -40,7 +40,7 @@ Fixes # (issue)
 
 ## Checklist
 
-<!-- Please remove all the irrelevant bullets to your PR -->
+<!-- Remove bullet points below that don't apply to you -->
 
 - I haven't read the [contributing guide](https://github.com/calcom/cal.com/blob/main/CONTRIBUTING.md)
 - My code doesn't follow the style guidelines of this project