Add native Bun SQL and SQLite drivers (upstream PR #58)

[tylergannon]

Summary

This PR applies upstream PR #58 which adds native Bun SQL and SQLite drivers.

Upstream Reference

Upstream PR: sqlc-dev/sqlc-gen-typescript#58
Status: Open (not yet merged upstream)
Author: @davisriedel

Changes

• Adds bun-sql driver for native Bun PostgreSQL support (Bun 1.2+)
• Adds bun-sqlite driver for native Bun SQLite support
• Zero external npm dependencies when using native Bun drivers
• Complete examples in examples/bun-sql/ and examples/bun-sqlite/

Why Apply Now

• Native Bun SQL provides better performance than compatibility layers
• No need to install pg or postgres npm packages
• Future-proof as Bun improves their SQL implementation
• Upstream repo has been slow to merge PRs (last merge was Nov 2024)

Rebasing Strategy

When upstream merges PR #58:

1. Fetch upstream: git fetch upstream
2. This commit can be dropped when rebasing: git rebase -i upstream/main
3. The commit message references the upstream PR for easy identification