'autopg uninstall --help' executes the uninstall instead of printing help

[vasconceloscezar]

Ran autopg uninstall --help (v3.0.7) expecting usage text. It performed the uninstall:

autopg: uninstalled pm2 entries: autopg-server, autopg-ui (data dir preserved at ~/.autopg/data)
autopg: cleared supervisor record from ~/.autopg/admin.json

This took down a postmaster serving live local databases. Data was preserved and autopg install --port <same> recovered, but --help must never execute the verb. Presumably other subcommands ignore unknown flags the same way — worth a global unknown-flag guard.

[automagik-genie]

Root cause: the case 'uninstall' branch of dispatch() in src/cli-install.cjs called mod.runUninstall() without forwarding the subcommand's args, so --help (or any flag) was dropped and the real teardown ran. There was also no confirmation in front of the pm2 delete of the postmaster, so nothing stood between a typo and a stopped database.

Fix in #148: args are forwarded, --help/-h prints usage and exits 0 before any pm2 call, unknown flags exit 2 with usage, and uninstall now prompts Continue? [y/N] on a TTY — --yes/-y skips it and is required on non-interactive terminals (exit 2 otherwise). Regarding the global unknown-flag guard for other subcommands: not in this PR, worth a separate issue.