feat(bot): add /ping command to issue management bot (JhaSourav07#168)

## Description
Fixes JhaSourav07#154

## Pillar
- [ ] 🎨 Pillar 1 — New Theme Design
- [ ] 📐 Pillar 2 — Geometric SVG Improvement
- [ ] 🕐 Pillar 3 — Timezone Logic Optimization
- [x] 🛠️ Other (Bug fix, refactoring, docs)

## Visual Preview
N/A — no SVG changes

## Checklist before requesting a review:
- [x] I have read the `CONTRIBUTING.md` file.
- [x] I have tested these changes locally
(`localhost:3000/api/streak?user=YOUR_USERNAME`).
- [x] I have run `npm run format` and `npm run lint` locally and
resolved all errors (CI will fail otherwise).
- [x] My commits follow the Conventional Commits format (e.g.,
`feat(themes): ...`, `fix(calculate): ...`).
- [ ] I have updated `README.md` if I added a new theme or URL
parameter.
- [x] I have starred the repo.
- [x] I have made sure that i have only one commit to merge in this PR.
- [ ] The SVG output matches the CommitPulse "premium quality" aesthetic
standard (no raw elements, smooth animations, correct fonts).
- [ ] (Recommended) I joined the CommitPulse Discord community for
contributor discussions, mentorship, and faster PR support.

Author: JhaSourav07

.github/scripts/issue-management/main.js

@@ -48,6 +48,14 @@ module.exports = async ({ github, context, core }) => {
       case 'claim':
         await handleClaim({ github, context });
         break;
+      case 'ping':
+        await github.rest.issues.createComment({
+          owner,
+          repo,
+          issue_number: issueNumber,
+          body: `🏓 **Pong!** CommitPulse Bot is online and fully operational.\n> UTC: ${new Date().toUTCString()}`,
+        });
+        break;
     }
   } catch (error) {
     core.error(`Error processing command /${parsed.command}: ${error.message}`);

.github/scripts/issue-management/parse-command.js

@@ -15,6 +15,9 @@ function parseCommand(commentBody) {
     const claimMatch = line.match(/^\/claim\s*$/i);
     if (claimMatch) return { command: 'claim' };
 
+    const pingMatch = line.match(/^\/ping\s*$/i);
+    if (pingMatch) return { command: 'ping' };
+
     const addlabelMatch = line.match(/^\/addlabel\s+(.+)$/i);
     if (addlabelMatch) {
       const labels = parseLabels(addlabelMatch[1]);