feat: condensed storage for subtitles and automatic captions

[tcely]

Fixes #1554

Lint complaints

• E741: Use a better font. 🤔

sync/utils.py:
   85:5  PLR1730 Replace `if` statement with `scaled_width = max(scaled_width, width)`
  178:8  SIM118 Use `key in dict` instead of `key in dict.keys()`
  223:16 SIM118 Use `key in dict` instead of `key in dict.keys()`
  227:12 SIM118 Use `key in dict` instead of `key in dict.keys()`
  274:12 SIM118 Use `key in dict` instead of `key in dict.keys()`
  277:21 SIM118 Use `key in dict` instead of `key in dict.keys()`
  284:12 SIM118 Use `key in dict` instead of `key in dict.keys()`
  316:18 FURB188 [*] Prefer `str.removesuffix()` over conditionally replacing with slice.
  318:18 FURB188 [*] Prefer `str.removesuffix()` over conditionally replacing with slice.
  320:18 FURB188 [*] Prefer `str.removesuffix()` over conditionally replacing with slice.

Approved while tests were failing.