Suggested test: copilot/skills-local-path

## Motivation

Link to the gh-aw PR: github/gh-aw#49115 — frontmatter `skills:` now accepts local skill paths (e.g. `skills/rig`, `.github/skills/my-skill`) installed via `--from-local`, in addition to pinned remote `owner/repo/path@sha` refs.

## Proposed test

- **Workflow file**: `test-copilot-skills-local-path.md`
- **Trigger**: `workflow_dispatch`
- **Engine**: copilot
- **Safe output**: `create-issue`
- **Variant**: standard

## Minimal test prompt sketch

Add a small local skill directory (e.g. `.github/skills/echo-fact`) to this repo with a trivial skill definition, reference it in frontmatter via `skills: [.github/skills/echo-fact]`, then have the agent invoke the skill and create an issue confirming the local skill's content was available.

## New fixtures or secrets needed

A new local skill fixture directory under `.github/skills/` in this repo (no new secrets). Existing `test-copilot-skills-frontmatter.md` only exercises a pinned remote skill ref, so this is complementary, not duplicate, coverage.

## Notes

No open suggestion or existing test currently covers local skill paths; remote skill ref path is already tested.

> Generated by [🔍 Suggest New E2E Tests](https://github.com/githubnext/gh-aw-test/actions/runs/30619899301) · aut00 · 18.1 AIC · ⌖ 8.11 AIC · ⊞ 8.3K · [◷](https://github.com/search?q=repo%3Agithubnext%2Fgh-aw-test+is%3Aissue+%22gh-aw-workflow-call-id%3A+githubnext%2Fgh-aw-test%2Fsuggest-new-e2e-tests%22&type=issues)

Start with test-copilot-skills-frontmatter.md to follow the existing pinned remote skill test, then add the named test-copilot-skills-local-path.md workflow and the .github/skills/echo-fact fixture described in the issue. Run the workflow_dispatch test with the copilot engine and confirm that the created issue demonstrates the local skill content was available.

Written by the indexing model from the issue text.