feat(cli): v2 — full API coverage, profiles, --json/--yes, containr up

Rewrite the CLI as a thin client over the authenticated API so agents
and scripts reach every resource the UI does (ROADMAP2 phase A2).

- shared Client with bearer auth, error-envelope decoding, and stable
  exit codes: 0 ok / 1 error / 2 auth / 3 not-found / 4 validation /
  5 unreachable
- named profiles in ~/.containr.yaml (current_profile + profiles.*);
  resolution order --flag > env > profile > localhost default;
  CONTAINR_TOKEN / CONTAINR_API_URL / CONTAINR_PROFILE env support
- --json prints raw API responses; --yes skips confirmations;
  destructive commands refuse non-interactively without it
- auth login verifies the token against /user/profile before saving,
  interactive prompt via term.ReadPassword
- commands for every resource: tokens, projects, services, deploy,
  deployments (logs/rollback), logs --follow (SSE), exec, variables
  (set/unset merge with secret masking preserved), databases
  (backup/restore/download), cron, templates, nodes + agent tokens,
  scaling, ha, security, gateway, admin, notifications
- containr up: git remote + branch → create-or-reuse service → deploy

Verified live: login/status/tokens/projects/services, up creating a
service + deployment, non-TTY confirmation refusal, scope-capped admin
rejection (exit 2), revoke.

Authored By: TDvorak <[email protected]>

README.md

@@ -57,6 +57,7 @@ dedicated console.
 - **Metrics** — per-service Docker stats plus host CPU/memory/disk telemetry
 - **HA & scaling** — failover policies, node agents, autoscaling rules
 - **Auth & security** — Better Auth sessions (email/password self-hosted), personal access tokens with `read`/`write`/`admin` scopes for CLI and agents, audit logs, vulnerability scans
+- **CLI** — `containr` covers the full API: projects, services, deployments, logs, exec, variables, databases, cron, templates, nodes, scaling, HA, security, gateway, admin — with `--json`, `--yes`, named profiles, and `containr up` for current-directory deploys
 - **Integrated docs** — searchable documentation rendered in-app on the landing page and `/docs`; syncs from GitHub, falls back to a bundled snapshot offline
 - **Networking** — Traefik reverse proxy, optional Cloudflare Tunnel