docs(readme): cut the badge row to four (repo-standard BADGE-COUNT WARN)

repo-standard v0.2.0 flagged 7 badges, past the measured inflection of 5
(Trockman et al., ICSE 2018) where a badge row reads as clutter rather
than evidence.

Dropped Commands/Agents/Hooks: the counts are stated in the sections
they describe, and every one of them was a hand-synced number that could
silently go stale — the same defect class that made the tests badge wrong
(1441 vs 1477) before it was removed. Kept Version, Platform, Scanners
(the distinguishing number, and the one count `self-audit --check-readme`
still asserts against the filesystem) and License.

`self-audit --check-readme`: PASS, exit 0 — absent badges are skipped by
design, so removing three does not weaken the gate.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011oUzeHA1Kmi2z8ug83PzbS

README.md

@@ -11,9 +11,6 @@ Know if your configuration is correct. Find what could improve it. Fix it automa
 ![Version](https://img.shields.io/badge/version-5.13.0-blue)
 ![Platform](https://img.shields.io/badge/platform-Claude_Code_Plugin-purple)
 ![Scanners](https://img.shields.io/badge/scanners-16-cyan)
-![Commands](https://img.shields.io/badge/commands-21-green)
-![Agents](https://img.shields.io/badge/agents-7-orange)
-![Hooks](https://img.shields.io/badge/hooks-4-red)
 ![License](https://img.shields.io/badge/license-MIT-lightgrey)
 
 A Claude Code plugin that checks configuration health, suggests context-aware improvements, and auto-fixes issues — `CLAUDE.md`, `settings.json`, hooks, rules, MCP servers, `@imports`, and plugins. 16 deterministic scanners across 10 quality areas, context-aware feature recommendations, auto-fix with backup/rollback, a prompt-cache-aware Token Hotspots scanner with optional API-calibrated `--accurate-tokens` mode, plus cache-prefix stability, dead-tool, cross-plugin collision, output-style, and always-loaded agent-listing-budget detection. Zero external dependencies.