add Monaco cheatsheet

src/components/editors/ScriptEditor/README.md

@@ -0,0 +1,16 @@
+Monaco editor cheatsheet
+
+```typescript
+// move the scroll:
+editor.setScrollPosition({ scrollTop: horizontalTimelineRatio })
+
+// Scroll to a specific line:
+editor.revealLine(15);
+
+// Scroll to a specific line so it ends in the center of the editor:
+editor.revealLineInCenter(15);
+
+// Move current active line:
+editor.setPosition({column: 1, lineNumber: 3});
+```
+