UI and Contract support for TE2

[aryamaanthakur]

Resolves: #3

This PR contains 2 features:

• Include TE2 option in web ui
• Include support for simple contract files

Additionally one more change was done to ensure passing of all the test cases - here. Because super glue dataset requires trust_remote_code set to True.

[ChanderG]

@aryamaanthakur Looks good. A few more things to add:

1. Create a tool to export contract for a dataset. This can be along the lines of the train tool here: https://github.com/foundation-model-stack/fm-training-estimator/tree/main/fm_training_estimator/regressor/xgboost
2. Instead of using the LinearReg from Sklearn, can you use the internal wrapper around the xgboost tool here?
3. Once we have 1, we need a way to let the user input the contract in the cli/ui instead of the real dataset.