Add workout videos, editable HyperFrames projects and music tools

- diamond-pushup (with and without music) and bench-dips videos
- Editable project sources for both videos
- make_music.py: original copyright-free music generator

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FXVsD1DgdzZLiPuwtKzMSY

videos/projects/bench-dips/hyperframes.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://hyperframes.heygen.com/schema/hyperframes.json",
+  "registry": "https://raw.githubusercontent.com/heygen-com/hyperframes/main/registry",
+  "paths": {
+    "blocks": "compositions",
+    "components": "compositions/components",
+    "assets": "assets"
+  },
+  "media": {
+    "autoProxy": true
+  }
+}