Release Railway configuration commands

[futurepastori]

Summary

Adds the v0 Railway configuration CLI flow for managing .railway/railway.ts from the official Railway CLI.

What changed

• Adds railway config init, pull, plan, and apply.
• Generates .railway/railway.ts plus local support files for teammates and agents.
• Imports existing Railway projects into a readable TypeScript DSL.
• Shows expanded, human-readable change previews before apply.
• Requires confirmation for config apply unless --yes is passed.
• Passes project and environment context to the TypeScript config runner.
• Resolves the SDK runner from the local project install, e.g. node_modules/.bin/railway-iac-ts.

Safety notes

• railway up behavior is unchanged; configuration changes only happen through railway config apply.
• Services already managed by railway.json or railway.toml are blocked from dual ownership.
• config pull --json is read-only and does not write support files.