Add External API Integration Support

I would like to suggest adding support for external API integrations in NoteWise. As someone who uses various productivity and data tools alongside note-taking, I believe this feature would dramatically expand what NoteWise is capable of.

With external API support, users could connect NoteWise to services like Google Calendar, Notion, Obsidian, weather APIs, or even custom REST APIs. This would allow users to pull in real-time data directly into their notes, automate workflows, or sync content across platforms — all without leaving NoteWise.

Some useful use cases would include:
- Embedding live data (e.g., schedules, task lists, or statistics) into notes
- Syncing notes or annotations with external platforms
- Triggering actions in other apps based on note content
- Connecting to AI APIs for smart note processing

Even a simple API key manager or webhook support would be a great starting point. This kind of integration would make NoteWise far more powerful as a productivity hub, not just a note-taking app.

I believe this feature would attract a wider range of power users and set NoteWise apart from other note-taking tools. Thank you for considering this!