DROID readme updates

Fix lint errors

fix droid action space for pi05 finetuning

add droid lerobot doc, custom finetuning example

make new droid idle filter default

minor edits, requested by karl

subsume filter_last_n_in_ranges into json ranges

fix precommit formatting issues

update to follow required merge patterns

update comments, readme

move filter_last_n_in_ranges to json

move option to remove last n in filter ranges to json generator

add filter json generation code

fix minor bugs

add json filtering

Update DROID README_train.md

Apply suggestions from code review

add roboarena policies

Update references to GCP assets

Update README_train.md

droid training pipeline

Fix typo in DROID README.md

cap DROID execution frequency

Initial commit