hdr to img, README updates

[jakehlee]

Closes #69
Closes #83

CLI scripts now take .img filepaths to products instead of .hdr.

READMEs updated with updated documentation and model performance metrics.

Testing

$ spectf-cloud deploy-trt --proba emit20241201t184959_cloud.tif emit20241201t184959_o33613_s000_l1b_obs_b0106_v01.img emit20241201t184959_o33613_s000_l1b_rdn_b0106_v01.img
[INFO] Starting inference.
[INFO] Iter 99: 0.30 min remain.
[INFO] Iter 199: 0.19 min remain.
[INFO] Iter 299: 0.09 min remain.
[INFO] Inference complete.
[INFO] Cloud mask saved to emit20241201t184959_cloud.tif

$ spectf-cloud deploy-pt --device 0 --proba emit20241201t184959_cloud.tif emit20241201t184959_o33613_s000_l1b_obs_b0106_v01.img emit20241201t184959_o33613_s000_l1b_rdn_b0106_v01.img
[INFO] Device is cuda:0
[INFO] Starting inference.
[INFO] Iter 99: 0.44 min remain.
[INFO] Iter 199: 0.25 min remain.
[INFO] Iter 299: 0.12 min remain.
[INFO] Inference complete.
[INFO] Cloud mask saved to emit20241201t184959_cloud.tif