Adjust pyproject.toml, MANIFEST.in

- Ensure new modules from #207 are packaged.
- Exclude .github etc. from distributions (parallel to
  iiasa/message_ix).

MANIFEST.in

@@ -1,10 +1,15 @@
+# Repository files for development, not distribution
+exclude .*
+prune .github
+
 # Data for testing
 prune message_ix_models/data/test/advance
 prune message_ix_models/data/test/gea
 prune message_ix_models/data/test/iea
 prune message_ix_models/data/test/shape
 prune message_ix_models/data/test/snapshot-*
 prune message_ix_models/data/test/ssp
+
 # Larger package data
 # - Not distributed on PyPI.
 # - Should be fetched with Pooch from GitHub.

pyproject.toml

@@ -161,7 +161,7 @@ select = ["C9", "E", "F", "I", "W"]
 # - .util.sdmx.as_codes(): 13 > 11
 mccabe.max-complexity = 11
 
-[tool.setuptools.packages.find]
-include = ["message_ix_models*"]
+[tool.setuptools.packages]
+find = {}
 
 [tool.setuptools_scm]