Function addNotes

addNotes(
    chart: RpeJson,
    lineIndex: number,
    beats: (number | [number, CreateNoteOptions])[],
    sharedOptions?: CreateNoteOptions,
): number[]
Add multiple notes at once to a line.

Each entry in beats can be either:
- A plain beat number (uses sharedOptions for all fields)
- A [beat, options] tuple (per-note options override sharedOptions)
Parameters
- chart: RpeJson
  The RPE chart (modified in place).
- lineIndex: number
  Target line index.
- beats: (number | [number, CreateNoteOptions])[]
  Array of beats or [beat, options] tuples.
- sharedOptions: CreateNoteOptions = {}
  Options applied to all notes (overridden by per-note options).
Returns number[]
Array of note indices in insertion order.
Example
```
// Add 4 taps at beats 1, 2, 3, 4
addNotes(chart, 0, [1, 2, 3, 4], { type: 1 });

// Mix of taps and a flick
addNotes(chart, 0, [
  [1, { type: 1, positionX: -200 }],
  [2, { type: 1, positionX:  200 }],
  [3, { type: 3 }],
]);
```
- Defined in chart-utils.ts:577