tests: run all tests, but exclude tests specific to my computer from CI

controllable via HPI_TESTS_KARLICOSS=true

tests/orgmode.py

@@ -1,6 +1,9 @@
 from my import orgmode
 from my.core.orgmode import collect
 
+from .common import skip_if_not_karlicoss
+
+@skip_if_not_karlicoss
 def test() -> None:
     # meh
     results = list(orgmode.query().collect_all(lambda n: [n] if 'python' in n.tags else []))