fix: add hatch build config for pip install from pyproject.toml

Hatchling couldn't find the package directory (expected shira_hermes/).
Added [tool.hatch.build.targets.wheel] packages to include api/ and
mcp_server/ directories.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pyproject.toml

@@ -18,6 +18,9 @@ dev = [
     "pytest-asyncio>=0.24.0",
 ]
 
+[tool.hatch.build.targets.wheel]
+packages = ["api", "mcp_server"]
+
 [build-system]
 requires = ["hatchling"]
 build-backend = "hatchling.build"