Fix: Load Vue DevTools extension using session.loadExtension (#1226)

[saisharan0103]

✅ What This PR Does

• Fixes Fix the vue-devtools extension installation #1226 — Vue DevTools not loading in Responsively App during development
• Uses Electron's session.defaultSession.loadExtension() API
• Resolves absolute path to extensions/vue-devtools
• Adds helpful success/error logs
• Handles missing folder gracefully (won't crash app)

🧪 Testing

• Tested on Electron v26+ in dev mode
• Confirmed Vue DevTools appears in developer tools
• Safe fallback tested by renaming/removing folder

🚫 Scope

• Does not affect React or other extensions
• Only modifies Vue DevTools install path

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Let me know if you'd like any changes. Otherwise, thanks for reviewing!

[CLAassistant]

All committers have signed the CLA.