Features/implement subcommands

[crossjam]

Worked with Gemini CLI to implement the full suite of commands.

Needs manual confirmation. Saving improvements to testing for a future PR.

[crossjam]

I might just sick copilot on the review.

[crossjam]

Type Checking Fixes

Resolved all 88 type diagnostics reported by ty across 10 source files.

Changes

• typer.echo(..., color=X) → typer.secho(..., fg=X) (86 occurrences) — Click's echo accepts a bool | None for the color parameter (enable/disable ANSI), not a color name. Switched to secho with fg for proper colored terminal output.

• Optional type annotations fixed (3 occurrences) — Parameters with = None defaults but non-optional type annotations (int, str) in auth.py, subscriptions.py, and supporting.py were corrected to int | None / str | None.

• Tomlkit nested dict access (4 occurrences in config.py) — Added cast(MutableMapping, ...) to resolve Item | Container union type inference when writing to nested TOML tables.

• Stray package-lock.json removed — Empty Node.js artifact was untracked; deleted and added to .gitignore.

Validation

• ✅ ruff lint — All checks passed
• ✅ ty typecheck — All checks passed (was 88 failures)
• ✅ pytest — 34/34 passed