[codex] add version info, profiles, and release packaging

[Arlowen]

Summary

• add build metadata support and expose version / --version
• switch config storage to global language + active profile + multi-profile state
• add config profiles list|use|add|remove and surface active profile in CLI UX
• package release assets through a shared release build flow and print installed build metadata after install
• add 0.1.2 changelog and refresh README / usage docs

Why

This turns the CLI from a raw build output into a more productized deliverable:

• users can inspect exactly which build they are running
• users can manage and switch across dev / test / prod contexts cleanly
• release outputs are now traceable, consistent, and installer-first

Validation

• go test ./...
• make build
• ./bin/cloudcanal version
• make release-assets VERSION=0.1.1
• local installer smoke test against generated dist/ assets