fix: bootstrap agent discovery + adapter version independence (#120)

- Step 1: detect hermes/claude before choosing adapter
- Adapter versions independent from CLI — install @latest
- ACP verification: hermes acp --help
- Remove uwf-builtin (not ready)

Refs #120

.changeset/bootstrap-ux-3.md

@@ -2,12 +2,13 @@
 "@united-workforce/cli": patch
 ---
 
-fix: improve bootstrap docs — pnpm/npm parity, adapter install order, preset provider table (#118)
+fix: improve bootstrap docs — agent discovery, pnpm/npm parity, preset provider table (#118, #120)
 
-- Step 1: show pnpm and npm side-by-side (not just pnpm with a comment)
+- Step 1: detect installed agents (hermes/claude) before choosing adapter
+- Step 1: clarify adapter versions are independent from CLI — install @latest
+- Step 1: show pnpm and npm side-by-side
 - Step 1: add "adapter must be installed before `uwf setup --agent`" note
-- Step 1: add `uwf --version` and adapter version verification with PATH troubleshooting
+- Step 1: add ACP verification step (hermes acp --help)
 - Step 2: `--agent` takes adapter command name (e.g. `uwf-hermes`), not npm package
 - Step 2: preset providers listed as a table with names and default base URLs
-- Step 2: non-preset providers must specify `--base-url` manually
-- Upgrade scenario: also show npm alternatives
+- Remove uwf-builtin from supported adapters (not ready yet)