docs(workshops): create world generation workshop brief from Q-077

Q-077 promoted to full workshop brief with 9 reference implementations,
7 key questions, 5 zone types, and agent assignments (Tyre, Gestalt,
Nigel, Miri, Ozzie).

Also: Q-089 through Q-092 filed (starfield, Markov names, event audio,
modular settings menu), make clean-imports target added.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Makefile

@@ -208,6 +208,15 @@ test-ipc-integration:
 test-ipc-benchmark:
 	tests/run-ipc-benchmark
 
+# --- Clean ---
+
+clean-imports:
+	@echo "Removing Godot import cache..."
+	rm -rf client/.godot/imported/
+	@echo "Re-importing assets (this may take a while on first run)..."
+	$(GODOT) --headless --path client --import --quit
+	@echo "Import cache rebuilt."
+
 # --- Lint ---
 
 lint: lint-server lint-client