fix(kyberforge): align skill factory with agentskills.io spec on directory rules

Move test infrastructure (validate.bats, new-skill.bats) from scripts/ to
tests/ — the spec defines scripts/ as executable code agents can run, so
test files don't belong there. Add tests/README.md placeholders with
bats-support dependency declaration.

Update skill-audit to permit tests/ and flag other unlisted directories,
add scripts/ purpose check, and add /skill-improve near-miss exclusion.
Update skill-improve and skill-write to cover tests/ in directory lists,
scaffold template, and authoring guidance.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

plugins/kyberforge/skills/skill-write/assets/templates/tests/README.md

@@ -0,0 +1,30 @@
+# tests/
+
+Test files for scripts bundled with this skill.
+
+## When to add tests
+
+Add tests here when the skill has scripts in `scripts/` that are complex enough
+to break silently — validators, parsers, generators, anything with branching
+logic or edge cases. Test infrastructure (`.bats`, `*_test.*`, `test_*.sh`)
+belongs here, not in `scripts/`.
+
+## Test runner
+
+Tests are run with [Bats](https://bats-core.readthedocs.io) for shell scripts.
+Install support libraries under `tests/test_helper/`:
+
+```bash
+git clone https://github.com/bats-core/bats-support tests/test_helper/bats-support
+git clone https://github.com/bats-core/bats-assert tests/test_helper/bats-assert
+```
+
+Run all tests:
+
+```bash
+bats tests/
+```
+
+## If no tests are needed
+
+Delete this README and the `tests/` directory entirely.