systems rework: buffs, prestige graph, research, modular architecture

Decouples core systems from centralized globals in favor of catalogue-based architecture and data-driven content.

   Key changes:
   - Prestige: node-based buff tech tree, graph panel, progress bar
   - Research: multi-worker system, per-generator research, xp generation
   - Ascension: meta-currency layer via multi-currency prestige resets
   - Buffs: refactored as generator-independent via catalogues
   - UI: currency panel, edge-scrolling camera + zoom, current-goal panel
   - Alchemy Tower: crafting building with recipe/cost system
   - Testing: 7 test suites (ascension, prestige, research, goals)
   - Content: migrated from hardcoded idles/ to gym format (tiny_sword)

scripts/run_all.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# Godot Test Runner - All Tests
+# Usage: ./scripts/run_all.sh
+
+set -e
+
+GODOT_BIN="${GODOT_BIN:-godot}"
+
+echo "=========================================="
+echo "Running All Tests"
+echo "=========================================="
+echo ""
+
+"$GODOT_BIN" --headless --path . -s res://tests/test_runner.gd
+EXIT_CODE=$?
+
+echo ""
+echo "=========================================="
+if [ $EXIT_CODE -eq 0 ]; then
+    echo "✓ All tests passed"
+else
+    echo "✗ Some tests failed"
+fi
+echo "=========================================="
+
+exit $EXIT_CODE