feat: implemented UI of looping feature

src/test/utils/mock-data.ts

@@ -121,6 +121,8 @@ export const createMockProject = (overrides: Partial<{
     defaults.timeSignature,
     'C major', // keySignature
     'ionian', // selectedMode
+    false, // isLooping
+    [0, 0], // loopingRange
     defaults.tracks, // tracks
     1 // projectStructureVersion
   )