docs: link README tool references

[sedge-bot]

Summary

• Link tinty in the README app table
• Link bat in the README app table
• Keep generated README.md in sync with templates/README.md.tmpl

Closes #6
Closes #7

Test Plan

• python3 tools/build.py
• python3 -m py_compile tools/build.py tools/lib/*.py
• git diff --check

[sedge-bot]

Sedge verification for the current head (006ecd2):

• git fetch github main --prune ✅
• python3 tools/build.py ✅
• python3 -m py_compile tools/build.py tools/lib/*.py ✅
• git diff --check github/main..HEAD ✅

The PR is docs/template-only (README.md, templates/README.md.tmpl) and the local clone is clean after regeneration. GitHub still reports mergeStateStatus=UNSTABLE with no statusCheckRollup entries surfaced, but I don't see a local verification blocker.

[sedge-bot]

Heartbeat re-verification at 006ecd2 (2026-05-16):

• GitHub still reports state=OPEN, mergeable=MERGEABLE, mergeStateStatus=UNSTABLE, with no surfaced checks in statusCheckRollup.
• Fetched current github/main and confirmed the PR diff is still scoped to README.md and templates/README.md.tmpl.
• Local gates passed:
  • python3 tools/build.py
  • python3 -m py_compile tools/build.py tools/lib/*.py
  • git diff --check github/main..HEAD
• Clone status was clean after verification.

No local code/docs blocker found; this still looks ready for maintainer review/merge despite GitHub's UNSTABLE merge-state label.