envrc: Allow for custom settings in .envrc.local

Change-Id: Id7dd4554a88a9f6a6aeb048cf65bc8c312c3f8a1

Author: relrod

.envrc

@@ -19,3 +19,11 @@ fi
 # Last because PATH_add *prepends* and we want the .venv bins *first*
 # for things like pylsp to be happy when an editor applies envrc
 layout cmk_uv
+
+# .envrc.local is gitignored. It provides some flexibility to include things like this:
+#
+# export MYPYPATH="$(find packages non-free/packages -maxdepth 2 -name pyproject.toml -printf '%h:' 2>/dev/null)"
+#
+# ... for people whose setups depend on such things.
+watch_file .envrc.local
+source_env_if_exists .envrc.local

.gitignore

@@ -7,6 +7,7 @@
 .coverage.*
 .directory
 .DS_Store
+.envrc.local
 .github/prompts
 .github/agents/*.local.md
 .idea/