[WiP] Add TerraFM backbone

[msohaildanish]

• Implements the TerraFM backbone with both Base and Large variants.
• Adds a Min–Max normalization method (MinMaxNormalize) for Sentinel data used by TerraFM.
• Includes basic tests for the TerraFM backbone.

[romeokienzler]

Thanks @msohaildanish - reviewing....

[romeokienzler]

@msohaildanish

================================================================ short test summary info ================================================================
FAILED tests/test_backbones.py::test_terrafm_backbones_forward[terrafm_base] - TypeError: object of type 'NoneType' has no len()
FAILED tests/test_backbones.py::test_terrafm_backbones_forward[terrafm_large] - TypeError: object of type 'NoneType' has no len()
FAILED tests/test_backbones.py::test_terrafm_l1c_patch_embed - TypeError: object of type 'NoneType' has no len()
FAILED tests/test_transforms.py::test_minmax_normalize_torch_channel_first - RuntimeError: The size of tensor a (224) must match the size of tensor b (2) at non-singleton dimension 1

Results (4059.36s (1:07:39)):
285 passed
4 failed
- tests/test_backbones.py:241 test_terrafm_backbones_forward[terrafm_base]
- tests/test_backbones.py:241 test_terrafm_backbones_forward[terrafm_large]
- tests/test_backbones.py:263 test_terrafm_l1c_patch_embed
- tests/test_transforms.py:21 test_minmax_normalize_torch_channel_first
10 skipped

[romeokienzler]

@msohaildanish did you have a chance to look into the errors?

moving to v1.2 since:

• this PR is stale
• v1.1.1 is a maintenance release anyway