feat: expand KNOWN_RUNTIMES allowlist in dependency checker

[mvanhorn]

Summary

Expands the KNOWN_RUNTIMES set in the dependency checker to cover common non-package terms that appear in stack documentation but get false DEPENDENCY_MISSING warnings.

Added terms

• Languages: Swift, Kotlin, Elixir, Erlang, PHP, .NET/C#
• Databases: DynamoDB, Cassandra, Neo4j, Supabase, Neon
• Cloud providers: Vercel, Netlify, Railway, Fly.io, Render, AWS/GCP/Azure/Cloudflare
• AWS services: S3, EC2, Lambda, ECS, Fargate
• Protocols: REST, GraphQL, gRPC, WebSocket, OAuth/JWT/SAML/OIDC
• CSS/Build: Tailwind CSS, Bootstrap, Sass, Webpack, Vite, esbuild, Turbopack
• Infrastructure: Git, GitHub, GitLab, Nginx, Apache, Caddy, Linux, WASM

Fixes #2

This contribution was developed with AI assistance (Claude Code).

[theDakshJaitly]

Looks good — merging! A couple things we'll clean up on our end:

1. Some entries are actual npm packages — tailwindcss, webpack, vite, esbuild, sass, postcss, bootstrap, rollup, parcel are all installable via npm. Having them in the allowlist means we won't catch them if they're claimed but actually missing from package.json. We'll trim those out.

2. Variable naming — KNOWN_RUNTIMES is getting stretched now that it covers CSS frameworks, build tools, and protocols. We'll likely rename it to something like KNOWN_NON_PACKAGES.

Thanks for the contribution!

[mvanhorn]

Thanks for the merge!

[theDakshJaitly]

appreciate it, thanks for contribution!