chore(repo): add LICENSE, CI workflow, and untrack local config

Public-repo hygiene now that the project is hosted on Forgejo:

- LICENSE: add the MIT text that pyproject.toml already declares.
- .forgejo/workflows/ci.yml: run the pytest suite on push/PR against
  Python 3.10 and 3.12, so regressions (e.g. the healthcheck port bug)
  get caught automatically.
- Untrack llama.cpp.config and gitignore it: it is a machine-specific
  runtime config that may later hold an api_key. The tracked template
  remains llama.cpp.config.example (copy it to get started).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.forgejo/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        # requires-python = ">=3.10"; test the floor and a recent version.
+        python-version: ["3.10", "3.12"]
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install package with dev extras
+        run: pip install -e ".[dev]"
+
+      - name: Run test suite
+        run: pytest -q