Adds two additive columns to the Twitter read commands (search, timeline,
tweets, thread, likes):
- has_media: boolean — true if the tweet contains any photo, video, or GIF
- media_urls: string[] — photo URLs and mp4 variant URLs for videos/GIFs,
extracted from legacy.extended_entities.media (falls back to entities.media)
The INTERCEPT/COOKIE payloads already carry this data; this change only
extends the row-mapping layer, so no new network work is needed. Pattern
mirrors #465 (time column).
Shared extraction helper lives in clis/twitter/shared.js so all five
adapters stay consistent, with unit coverage for photo, video (mp4 variant
selection), animated_gif, entities.media fallback, and the empty case.
Closes#1107
Dylanwoo