feat: widen scope to AI developer tools; enforce hard 1,000-star floor

The list was already drifting past "coding agents" — ADEs were admitted in
the previous commit. Rather than keep widening criterion 1 one category at a
time, it now describes the actual subject: developer tools built around AI.
The dividing line becomes tools you use vs. building blocks you import, which
keeps libraries, SDKs, model weights and skill collections out.

The star floor drops from a soft "roughly 10,000+" to a hard 1,000:

- enforceStarFloor drops any below-floor entry from the ranking and emits an
  ::error:: annotation, so the published list can never violate the rule.
  Dropping rather than failing keeps one bad entry from blocking the refresh
  of every other repo.
- -check cannot catch this (star counts need the API, -check runs offline);
  docs/CONTRIBUTING.md says so explicitly.

Side effect: Orkas (1,998 stars) now clears the floor it previously missed.

go run . -check: 43 agents valid. go test ./...: ok.

README.md

@@ -1,6 +1,6 @@
 # Awesome Coding Agents
 
-> Curated ranking of AI agent coding tools, sorted by GitHub stars.
+> Curated ranking of AI-powered developer tools, sorted by GitHub stars.
 > Updated daily by GitHub Actions.
 
 📊 **[Interactive dashboard with star-history charts →](https://tiennm99.github.io/awesome-coding-agents/)**
@@ -68,8 +68,8 @@
 
 **Inclusion criteria** — a repo belongs on this list when it is:
 
-1. **An AI coding agent, or an environment for running them** — either a tool that autonomously writes, edits, or reviews code, or an *agent development environment* (ADE) that runs and coordinates those agents as its primary purpose. Libraries, SDKs, prompt/skill collections, and observability-only layers remain out of scope.
-2. **Notable**: roughly **10,000+ GitHub stars** (the current list floor).
+1. **A developer tool built around AI** — something a developer uses to build software, where an LLM is central to what it does. That covers agents that write, edit, or review code; agent development environments that run and coordinate them; and AI-assisted editors, terminals, and review tools. Libraries, SDKs, model weights, and prompt or skill collections are out of scope — this list ranks tools you *use*, not building blocks you *import*.
+2. **At least 1,000 GitHub stars** — a hard floor, enforced by the updater. An entry below it is dropped from the ranking automatically, so the threshold is never waived for an individual entry.
 3. **Open source and actively maintained** — no push in **6 months** means the entry is dropped. The daily run flags anything past **3 months** for review, so the ranking reflects tools people can actually use today.
 
 Archived or abandoned repos are kept only when they are historically significant, and are marked as such in [`data/agents.yml`](data/agents.yml).