feat(commands): add approve command for approving PRs

.rulesync/commands/approve.md

@@ -0,0 +1,74 @@
+---
+targets:
+  - "*"
+description: Approve a pull request using gh pr review --approve
+---
+
+# Approve Pull Request
+
+Approve a pull request using `gh pr review --approve`.
+
+## Input
+
+```
+$ARGUMENTS
+```
+
+## Step 1: Determine the Target PR
+
+Parse `$ARGUMENTS` to identify the PR to approve:
+
+### Case A: PR number or URL is provided
+
+- Extract the PR number from the argument
+- Examples: `123`, `#123`, `https://github.com/owner/repo/pull/123`
+
+### Case B: No argument provided
+
+- Get the PR associated with the current branch:
+  ```bash
+  gh pr view --json number,title,state
+  ```
+
+### Case C: Unable to determine the PR
+
+If the PR cannot be determined (e.g., no PR exists for the current branch, or the argument is ambiguous), **ask the user** to specify which PR to approve.
+
+## Step 2: Verify the PR
+
+Before approving, confirm the PR details:
+
+```bash
+gh pr view <pr_number> --json number,title,state,author,baseRefName,headRefName,isDraft
+```
+
+Check:
+
+1. The PR state is `OPEN`
+2. The PR is not a draft (`isDraft` is `false`)
+3. Display the PR title, number, and author to the user for confirmation
+
+If the PR is not open or is a draft, inform the user and stop.
+
+## Step 3: Approve the PR
+
+Execute the approve command:
+
+```bash
+gh pr review <pr_number> --approve
+```
+
+**Important**: Only approve ONE PR at a time. If multiple PRs are somehow specified, ask the user which single PR to approve.
+
+If you want to add a comment along with the approval, use the `--body` option:
+
+```bash
+gh pr review <pr_number> --approve --body "<approval_comment>"
+```
+
+## Step 4: Report Result
+
+After approving:
+
+1. Confirm the PR was successfully approved
+2. Display the approved PR number and title