workspace: add rule for running commands in sequencer venv

Author: AvivYossef-starkware

.cursor/rules/run-commands-in-venv/RULE.md

@@ -0,0 +1,9 @@
+git aff ---
+description: "Ensures commands are run within the virtual environment"
+globs: "*"
+alwaysApply: true
+---
+
+# Overview
+
+ALWAYS run ". sequencer_venv/bin/activate" before executing any terminal commands.