Exoiris

Added

- Added `offset_group` variable to `TSData` that can be used in ExoIris to account for bias offsets between instruments
and monochromatic transit-to-transit variations in transit depths caused by unocculted stellar heterogeneities, such
as spots and faculae.

Added

- Added support for masked data support with GP noise model.
- Added an option to set the GP hyperparameters for an individual data set.
- Added `white_times`, `white_fluxes`, `white_models`, and `white_errors` properties to `ExoIris` to access white ligth curve data.

Fixed

- Fixed model loading with masked data.

Added
- **New Data Mask:** Introduced a general `mask` attribute in the `TSData` class to automatically flag valid data points (based on finite fluxes and errors).
- **Uncertainty Estimation:** Added the `estimate_average_uncertainties` method in `TSData` to compute per-wavelength uncertainties using first differences.
- **White Light Curve Processing:** Updated the `WhiteLPF` class to use `nanmean` and `isfinite` checks when computing the white light curve, ensuring only valid flux values are averaged.

Changed
- **Transit Mask Renaming:** Renamed the old `ootmask` attribute to `transit_mask` throughout the codebase for clarity. This change affects plotting, normalization, binning, and file I/O.
- **Method Renaming:** Renamed `calculate_ootmask` in the `TSDataSet` class to `mask_transit` to reflect the updated naming convention.
- **Normalization Enhancements:** Updated normalization methods (`normalize_to_poly` and `normalize_to_median`) to utilize the new `transit_mask` and `mask` attributes, improving the reliability of baseline fits.
- **Cropping Flexibility:** Added an `inplace` parameter to both `crop_wavelength` and `crop_time` methods, allowing users to choose between modifying the existing data or returning a new cropped instance.
- **Likelihood Function Update:** Modified the `lnlike_normal` function in `TSLPF` to accept an additional `mask` parameter and process only valid data points during likelihood calculations.
- **Outlier Handling:** Refined the `remove_outliers` method to flag outliers by setting affected fluxes and errors to NaN, rather than replacing them with median-filtered values.

Removed
- **Removed Deprecated Method: `calculate_ootmask`**
This method (deprecated since v0.9) has been removed in favor of the new transit masking functionality.
- **Removed Deprecated Method: `normalize_baseline`**
The `normalize_baseline` method (deprecated since v0.9) has been removed; users should now use `normalize_to_poly`.
- **Removed Deprecated Method: `normalize_median`**
The deprecated `normalize_median` method has been removed. Its functionality is now available via `normalize_to_median`.
- **Removed Deprecated Method: `split_time`**
The `split_time` method, deprecated since v0.9, has been removed. Use `partition_time` instead.