Initial commit: Go port scaffolding

- Go project structure (go.mod, cmd/gt/main.go)
- Beads database initialized with gt- prefix
- Town management design doc (docs/town-design.md)
- Basic README and CLAUDE.md

Epics tracked:
- gt-u1j: Port Gas Town to Go
- gt-f9x: Town & Rig Management

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

go.mod

@@ -0,0 +1,3 @@
+module github.com/steveyegge/gastown
+
+go 1.23