chore(dev): add justfile

Author: pythoninja

justfile

@@ -0,0 +1,11 @@
+#!/usr/bin/env just --justfile
+
+switch branch:
+    @echo 'Fetching and switching to {{branch}}'
+    git fetch origin && git switch '{{branch}}'
+
+master-pull:
+    git switch master && git pull
+
+clear-env:
+    rm -rf {{justfile_directory()}}/.venv