fix: Added readme for stale-pr

Author: maharshi-cd

docs/stale-pr.md

@@ -0,0 +1,43 @@
+## [Stale Issues and PRs Workflow](https://github.com/clouddrove/github-shared-workflows/blob/master/.github/workflows/stale_pr.yml)
+
+This workflow automatically marks and closes stale issues and pull requests after periods of inactivity. `.github/workflows/stale_pr.yml`
+
+### Overview
+Automatically:
+- Marks issues as stale after 30 days of inactivity
+- Marks PRs as stale after 30 days of inactivity
+- Closes stale issues after 10 more days
+- Closes stale PRs after 10 more days
+- Deletes branches of closed PRs
+- Exempts items with specific labels or milestones
+
+### Features
+- Configurable time periods for staleness and closure
+- Customizable stale and close messages
+- Exclusion for items with specific labels (`bug`, `wip`, `on-hold`, `no-stale`)
+- Exclusion for all items with milestones
+- Automatic branch cleanup for closed PRs
+
+### Usage
+This workflow is designed to be called from other workflows using GitHub's `workflow_call` trigger.
+
+#### Example Implementation
+```yaml
+name: 'Mark or close stale issues and PRs'
+
+on:
+  schedule:
+    - cron: '0 0 * * 5'  # Runs every Friday midnight
+  workflow_dispatch:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  stale-pr:
+    uses: clouddrove/github-shared-workflows/.github/workflows/stale_pr.yml@master
+    with:
+      days-before-issue-stale: 30  # Days until issue marked stale
+      days-before-pr-stale: 30     # Days until PR marked stale
+      days-before-issue-close: 10  # Days after stale until issue closed
+      days-before-pr-close: 10     # Days after stale until PR closed