fix: replace zero-human-companies tagline with new positioning (#7580)

## Thinking Path

> - Paperclip is the open source app people use to manage AI agents for
work
> - The CLI README and banner are the first thing new users see when
running `paperclipai`
> - They still carried the old "zero-human companies" tagline from a
prior positioning
> - Since we've pivoted positioning to "the app people use to manage
agents at work", that copy is now off-brand and misleading
> - This pull request rewrites the CLI banner subtitle and re-syncs
`cli/README.md` from the canonical root `README.md`
> - The benefit is consistent positioning across the CLI surface, root
docs, and onboarding

## Linked Issues or Issue Description

Refs internal issue: audit "zero human companies" mentions in the repo
and align CLI surfaces with the new positioning.

## What Changed

- `cli/src/utils/banner.ts`: replace the "zero-human companies" subtitle
with the new positioning line
- `cli/README.md`: re-sync from the root `README.md` so the CLI doc no
longer drifts (+146/-22)

## Verification

- `git diff origin/master...HEAD` shows only `cli/README.md` and
`cli/src/utils/banner.ts`
- Run `paperclipai` locally and confirm the banner subtitle reflects the
new positioning
- Diff `cli/README.md` against root `README.md` and confirm parity

## Risks

Low risk — docs-only and a one-line banner string. No runtime behavior
change, no schema/migration impact.

## Model Used

Claude Opus 4.7 (claude-opus-4-7), extended thinking, tool use.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have searched GitHub for duplicate or related PRs and linked
them above
- [x] I have either (a) linked existing issues with `Fixes: #` / `Closes
#` / `Refs #` OR (b) described the issue in-PR following the relevant
issue template
- [x] I have run tests locally and they pass
- [ ] I have added or updated tests where applicable (docs-only)
- [ ] If this change affects the UI, I have included before/after
screenshots (CLI banner string; no UI)
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [ ] All Paperclip CI gates are green (will monitor after open)
- [ ] Greptile is 5/5 with no open P2s, recommendations, or follow-ups
(will monitor after open)
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

cli/src/utils/banner.ts

@@ -9,7 +9,7 @@ const PAPERCLIP_ART = [
   "╚═╝     ╚═╝  ╚═╝╚═╝     ╚══════╝╚═╝  ╚═╝ ╚═════╝╚══════╝╚═╝╚═╝     ",
 ] as const;
 
-const TAGLINE = "Open-source orchestration for zero-human companies";
+const TAGLINE = "The app people use to manage AI agents for work";
 
 export function printPaperclipCliBanner(): void {
   const lines = [