lint: exclude generated files from codespell

The templ-generated Go files and the docs build output trigger
false positives. Exclude them along with the pw binary.

Signed-off-by: Robin Jarry <robin@jarry.cc>

Author: rjarry

.codespellrc

@@ -3,4 +3,9 @@
 [codespell]
 quiet-level = 35
 ignore-regex = ([\w'".-]+\s+)*<[\w+.=~/-]+@[a-z0-9.-]*[a-z0-9]>
-skip = pkg/mail/testdata
+skip =
+	pkg/mail/testdata,
+	docs/_build,
+	docs/.venv,
+	*_templ.go,
+	pw,