chore: enhance project metadata, tooling, and documentation

**Project Configuration:**
- Enhance pyproject.toml with comprehensive metadata, keywords, and classifiers
- Add LICENSE file (MIT) for proper open-source distribution
- Add PUBLISHING.md with comprehensive publishing guidelines
- Update .gitignore to exclude tool artifacts (.cache, .pytest_cache, .ruff_cache, .ty_cache)
- Ignore documentation working directories (.docs, .full-review, docs/plans, docs/sessions)

**Documentation:**
- Add extensive Unraid API research documentation
  - API source code analysis and resolver mapping
  - Competitive analysis and feature gap assessment
  - Release notes analysis (7.0.0, 7.1.0, 7.2.0)
  - Connect platform overview and remote access documentation
- Document known API patterns, limitations, and edge cases

**Testing & Code Quality:**
- Expand test coverage across all tool modules
- Add destructive action confirmation tests
- Improve test assertions and error case validation
- Refine type annotations for better static analysis

**Tool Improvements:**
- Enhance error handling consistency across all tools
- Improve type safety with explicit type annotations
- Refine GraphQL query construction patterns
- Better handling of optional parameters and edge cases

This commit prepares the project for v0.2.0 release with improved
metadata, comprehensive documentation, and enhanced code quality.

Co-authored-by: Claude <noreply@anthropic.com>

tests/test_array.py

@@ -70,6 +70,32 @@ class TestArrayActions:
         assert result["success"] is True
         assert result["action"] == "shutdown"
 
+    async def test_stop_array(self, _mock_graphql: AsyncMock) -> None:
+        _mock_graphql.return_value = {"setState": {"state": "STOPPED"}}
+        tool_fn = _make_tool()
+        result = await tool_fn(action="stop", confirm=True)
+        assert result["success"] is True
+        assert result["action"] == "stop"
+
+    async def test_reboot(self, _mock_graphql: AsyncMock) -> None:
+        _mock_graphql.return_value = {"reboot": True}
+        tool_fn = _make_tool()
+        result = await tool_fn(action="reboot", confirm=True)
+        assert result["success"] is True
+        assert result["action"] == "reboot"
+
+    async def test_parity_pause(self, _mock_graphql: AsyncMock) -> None:
+        _mock_graphql.return_value = {"parityCheck": {"pause": True}}
+        tool_fn = _make_tool()
+        result = await tool_fn(action="parity_pause")
+        assert result["success"] is True
+
+    async def test_unmount_disk(self, _mock_graphql: AsyncMock) -> None:
+        _mock_graphql.return_value = {"unmountArrayDisk": True}
+        tool_fn = _make_tool()
+        result = await tool_fn(action="unmount_disk", disk_id="disk:1")
+        assert result["success"] is True
+
     async def test_generic_exception_wraps(self, _mock_graphql: AsyncMock) -> None:
         _mock_graphql.side_effect = RuntimeError("disk error")
         tool_fn = _make_tool()