chore(pi-fff): migrate from @mariozechner to @earendil-works packages

[SamuelLHuber]

Update deprecated package names in peerDependencies and imports:

• @mariozechner/pi-coding-agent → @earendil-works/pi-coding-agent
• @mariozechner/pi-tui → @earendil-works/pi-tui

[Copilot]

Pull request overview

Migrates the pi-fff extension off deprecated @mariozechner/* package names to the new @earendil-works/* equivalents, aligning imports and peer dependency declarations with the renamed upstream packages.

Changes:

• Updated pi-fff TypeScript imports to reference @earendil-works/pi-coding-agent and @earendil-works/pi-tui.
• Updated pi-fff peerDependencies to the new package scope.
• Bumped the Neovim help doc “Last change” date.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
packages/pi-fff/src/index.ts	Switches imports to @earendil-works/* packages.
packages/pi-fff/package.json	Switches peer dependency package names to @earendil-works/*.
doc/fff.nvim.txt	Updates documentation “Last change” header date.

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[SamuelLHuber]

@dmtrKovalenko let me know if you're fine with me merging these on my own or I shall ping you on these.

Pi has changed their repo from https://github.com/badlogic/pi-mono/ to https://github.com/earendil-works/pi/ and the npm packages too as Mario joins Earendil Works. so I've updated the dependencies.

[dmtrKovalenko]

I think it's always better to get a review just in case. I would love my changes to be reviewed by someone there is just no one here who will do that for rust code 😅

[SamuelLHuber]

perfekt, then I intuitively did it right.

yeah I am not proficient in rust. there is agents, but they are like a catch low hanging fruits and ping pong rather then a proper review unless one spends the time to set their environment up to level up imo (for these kinds of libraries like fff, it's different for basic business app level code)