Parse namespaced/single-space/arg-gapped entries; add 5 CLIs + ~40 fixtures

[devin-ai-integration]

Summary

More parser coverage plus the largest fixture batch yet: 5 new CLIs (tofu, istioctl, pack, supabase, firebase) and ~45 nested fixtures, all ok in testdata/help/manifest.tsv. Also a licensing fix: sops and tofu are MPL-2.0 (file-level copyleft), so their fixtures are hand-written synthetics, not verbatim captures.

Parser changes in internal/helptext/parse.go:

• looksLikeSubPath(n) — namespaced a:b names are valid in pipe-separated alias lists, so firebase's mcp|experimental:mcp entry parses instead of flushing the whole Commands section.
• relaxedEntry — inside a known commands section only, accept name + single space + CapitalizedDesc. Needed for cobra layouts where an overlong name overflows the padded column (istioctl create-remote-secret Create a secret ...).
• prefixedEntry now runs skipArgs(rest) before giving up, so wrangler d1 create <name> Creates ... collects the group (wrangler d1 went 3 → 9 entries).
• skipArgs no longer bails when j == 0 after a multi-word bracket group ([<job-id | job-name>]) consumed its trailing separator space (glab retry, trigger, view were dropped).
• A deeper-indented bare single token ( directory wrapping a firebase description) is absorbed into the previous entry's description instead of becoming a bogus entry.
• Qualifying prefix groups (≥2 same-prefix names) now merge alongside section results rather than only when sections are empty — a single stray section entry (build in yarn) no longer suppresses the yarn-prefixed group.

New manifest rows (~48): root rows for tofu/istioctl/pack/supabase/firebase plus nested doctl apps|kubernetes, argocd app|proj, glab mr|ci|release|issue|repo|auth, pulumi stack|config|plugin, flux create|get|reconcile, eksctl create|get, minikube addons|image, vercel env|teams, wrangler kv|r2|d1|pages, netlify env|functions, railway environment, hatch env|dep, pdm venv|python, meson wrap, rye toolchain|tools, stripe customers, hcloud server, supabase functions, firebase emulators. New captured fixtures are all permissively licensed and listed in testdata/help/NOTICE.md, which now also states the policy explicitly treats MPL like GPL (synthetic only).

Link to Devin session: https://app.devin.ai/sessions/6b27c26293e1466cb4b3f495d9cf77ea
Open in Devin Desktop: https://app.devin.ai/desktop/session/6b27c26293e1466cb4b3f495d9cf77ea?variant=devin
Requested by: @syumai

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring