use hatchling instead of flit

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
-requires = ["flit_core"]
-build-backend = "flit_core.buildapi"
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
 [project]
 name = "ahriman"
@@ -89,17 +89,26 @@ web = [
     "setuptools",  # required by aiohttp-apispec
 ]
 
-[tool.flit.sdist]
+[tool.hatch.version]
+path = "src/ahriman/__init__.py"
+
+[tool.hatch.build.targets.sdist]
 include = [
     "AUTHORS",
     "CONTRIBUTING.md",
     "SECURITY.md",
     "package",
+    "src",
     "web.png",
 ]
 exclude = [
     "package/archlinux",
 ]
 
-[tool.flit.external-data]
-directory = "package"
+[tool.hatch.build.targets.wheel]
+packages = [
+    "src/ahriman",
+]
+
+[tool.hatch.build.targets.wheel.force-include]
+"package" = "ahriman/data"