feat(desktop): implement SQLite database integration with Drizzle ORM

[Red-Asuka]

This pull request introduces a SQLite database integration using Drizzle ORM for the desktop application. The changes include configuration updates, new database schema definitions, and modifications to various files to support database operations.

Database Integration:

• Added drizzle.config.ts for Drizzle ORM configuration.
• Created db.main.ts and db.renderer.ts to set up the database and handle database operations. [1] [2]
• Defined a new database schema in posts.ts.

Configuration Updates:

• Updated .gitignore to ignore database files.
• Modified package.json to include new scripts and dependencies for SQLite and Drizzle ORM. [1] [2] [3]

Code Modifications:

• Updated index.ts to handle database execution and migration on app readiness. [1] [2] [3] [4]
• Changed preload/index.ts to expose a custom API for database execution.

Frontend Integration:

• Updated settings.vue to insert and display mock data from the database.

TypeScript Configuration:

• Modified tsconfig.node.json and tsconfig.web.json to include new database files. [1] [2]