Adds a comfy-free helper that retimes a source frame sequence to a
target fps while preserving real duration (VideoHelperSuite-style
force_rate) — 0 means off, dropping/duplicating frames otherwise.
Needed by the upcoming Multi Video Loader nodes.
Batch already means one-item-per-queued-run in this pack (AI2GoPromptBatch);
these loaders emit everything in a single run, so Batch was misleading.
Renamed the four loader nodes/files/classes to Multi (AI2GoMultiImageLoader,
AI2GoMultiImageLoaderAdvanced, AI2GoMultiAudioLoader, AI2GoMultiAudioLoaderAdvanced),
and reworded DOWNSCALE_MODES from fit/crop/stretch to the plain-word
"keep aspect ratio"/"crop to square"/"stretch to square" (behavior unchanged).
Nothing published yet, so no back-compat aliases were added.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>