v3.0.0: Projen + ESLint flat config

Switched to projen for config management, converted to using the new ESLint flat config format, and adopted Prettier's experimental ternaries 🚀

What's Changed

New Features 🃏

• Switch to new prettier ternaries by @merrywhether in #243
• Switch to flat config and ESM by @merrywhether in #244
• Convert to projen for config maintenance by @merrywhether in #247

Dependency Updates 🧶

• Renovate dependency eslint-plugin-react to ^7.34.1 by @renovate in #230
• Renovate pnpm to v8.15.5 by @renovate in #231
• Renovate typescript-eslint monorepo to ^7.3.1 by @renovate in #232
• Renovate dependency eslint-plugin-solid to ^0.13.2 by @renovate in #233
• Renovate dependency typescript to ^5.4.3 by @renovate in #234
• Renovate pnpm to v8.15.6 by @renovate in #237
• Renovate Node.js to >=20.12.0 by @renovate in #236
• Renovate Node.js to >=20.12.1 by @renovate in #238
• Renovate dependency typescript to ^5.4.4 by @renovate in #239
• Renovate dependency typescript to ^5.4.5 by @renovate in #241
• Renovate Node.js to >=20.12.2 by @renovate in #242
• Renovate typescript-eslint monorepo to ^7.6.0 by @renovate in #235
• Renovate pnpm to v8.15.7 by @renovate in #246

Full Changelog: v2.9.1...v3.0.0