feat(auth): Make bare sentry auth run login

[sentry-junior]

Make sentry auth the same as sentry auth login, and teach onboarding/installer copy to recommend the shorter form.

Default command

The auth route default is now login instead of status, so bare sentry auth starts the login flow. sentry auth login still works.

Onboarding copy

Curl installer welcome text, help example, README/quick start, getting-started docs, and skill docs now say sentry auth.

Skill example matching

Bare group examples like sentry auth are associated with the route's default subcommand so generated skill references keep login examples.

Checks: vitest for setup/help/command-suggestions/skill-markdown (78 passed). Manually verified sentry auth starts login.

Requested by David Cramer.

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View Junior Session [Sentry]

[BYK]

Jared, would be ideal if sentry auth would do sentry auth login when logged out and sentry auth status when logged in

[cursor]

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[jared-outpost]

@BYK this is done — bare sentry auth now runs login when logged out and status when logged in (a hidden default dispatcher on the auth route, in b1310a3). Login-only flags like --token/--url still force the login path even when authenticated. sentry auth login and sentry auth status continue to work explicitly.

Also fixed the misaligned installer welcome columns cursor flagged, and cleared a couple of biome lint failures the dispatcher work introduced (useMaxParams on associateCodeBlocks, plus a formatter nit). CI is green on 234adb9.