Initial commit: InTono — app KMP per l'apprendimento musicale

App Kotlin Multiplatform (Android/iOS/Desktop) con Compose Multiplatform:
controllo intonazione (YIN), pratica guidata, metronomo, ear training,
sfide, scansione spartiti via AI, spartiti bundled e pentagramma con
glifi tipografici, travature, battute e spaziatura proporzionale.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

video/.agents/skills/remotion-best-practices/rules/subtitles.md

@@ -0,0 +1,36 @@
+---
+name: subtitles
+description: subtitles and caption rules
+metadata:
+  tags: subtitles, captions, remotion, json
+---
+
+All captions must be processed in JSON. The captions must use the `Caption` type which is the following:
+
+```ts
+import type { Caption } from "@remotion/captions";
+```
+
+This is the definition:
+
+```ts
+type Caption = {
+  text: string;
+  startMs: number;
+  endMs: number;
+  timestampMs: number | null;
+  confidence: number | null;
+};
+```
+
+## Generating captions
+
+To transcribe video and audio files to generate captions, load the [./transcribe-captions.md](./transcribe-captions.md) file for more instructions.
+
+## Displaying captions
+
+To display captions in your video, load the [./display-captions.md](./display-captions.md) file for more instructions.
+
+## Importing captions
+
+To import captions from a .srt file, load the [./import-srt-captions.md](./import-srt-captions.md) file for more instructions.