ci: add GitHub Actions workflow for lint, typecheck and build

[devZenta]

This pull request introduces a new continuous integration (CI) workflow using GitHub Actions. The workflow automates linting, formatting, type checking, and building of the project, ensuring code quality and reliability on every push or pull request to the main branch.

Key additions in the CI pipeline:

Workflow setup and triggers:

• Added a .github/workflows/ci.yml file to define the CI workflow, which runs on pushes and pull requests targeting the main branch.
• Configured concurrency to prevent overlapping runs for the same branch or pull request.

Automated jobs:

• Added a lint job to check code formatting and run linting using Bun.
• Added a typecheck job that generates the Prisma client and runs type checking.
• Added a build job that depends on successful linting and type checking, then builds the project with the necessary environment variable for the database.