Land five stalled contributions from the PR backlog

[ledwards]

Five PRs, open between one and four years, whose ideas were good but whose patches no longer applied. Reapplied on current main with credit to the original authors.

Original	Author	What landed
#106	@mantra-1	cowsay
#72	@nkulkarni	date and wget
#84 / #85	@ophiuchus44, @jandobrx	RickRoll plays in-terminal everywhere
#51	@astonm	cd test coverage

Commands

cowsay prints the classic bubble and cow. It uses writeln rather than stylePrint because it's alignment-sensitive art that stylePrint would wrap and recolor.

date prints the real date. wget points at curl, which already carries the joke response.

All three are added to the README's advanced command list. Tab completion picks them up from the commands object automatically.

The RickRoll

#84 and #85 both wanted the joke to play in the terminal instead of punting the user to an imgur GIF in a new tab. That landed for test at some point — but cat id_rsa, grep <pattern> id_rsa and open test.htm were left behind, still calling openURL on the GIF.

So the original complaint was still half-true. All four routes now go through a single _rickRoll() helper, which means they can't drift apart again. Their proposed fix (shelling out to ascii.live/rick via curl) isn't used — the repo's own rickroll.js animation is better and has no external dependency.

cd tests

cd is the one command with real branching — a switch over ~, .., /home, /bin and team member names, several branches of which recurse through term.command — and it drives term.cwd, which the prompt renders on every keystroke. It had no tests.

The table is @astonm's from #51, ported to the current vitest harness and extended with the permission-denied and unknown-directory paths.

Test plan

• npm test — all passing, 20 new cases
• npm run build, served dist/, and exercised each command in a real terminal: cowsay renders correctly, date and wget print as expected (both with and without an argument)
• Confirmed all four RickRoll routes fire the in-terminal animation and open zero external URLs

Closes #106, #72, #84, #85, #51.

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