Gaiaxpy

What's Changed
* Fix issue with loading a nested directory with additional systems: 100
* Fix issue with substrings in additional system names: 102
* Remove unnecessary restriction in error correction: 103
* Add internal query marker: 106

What's Changed

* Fix incompatibility with Archive output affecting ADQL queries: https://github.com/gaia-dpci/GaiaXPy/issues/91
* Deprecate Python 3.7 in favour of 3.12: https://github.com/gaia-dpci/GaiaXPy/issues/81
* Change in output for sources with a missing band (converter): https://github.com/gaia-dpci/GaiaXPy/issues/78
* Change in output for sources with a missing band (generator): https://github.com/gaia-dpci/GaiaXPy/issues/79
* Bug fix (specific to additional_systems and Gaia_DR3_Vega): https://github.com/gaia-dpci/GaiaXPy/issues/83
* Remove conditions on additional filters file names: https://github.com/gaia-dpci/GaiaXPy/issues/72

What's Changed
* Fix/51 52 output format by druzm in https://github.com/gaia-dpci/GaiaXPy/pull/54
* Improved progress tracker by druzm in https://github.com/gaia-dpci/GaiaXPy/pull/57
* Speed improvements by druzm in https://github.com/gaia-dpci/GaiaXPy/pull/60
* Python 3.6 no longer supported.

More details can be found in the Release Notes section in the documentation page.

Fixed issue in function for computing the inverse of the covariance matrix (`get_inverse_covariance_matrix`).
Fixed issue in function to get chi-squared from an input inverse square root of covariance matrix (`get_chi2`).
Added function to compute the inverse square root of the covariance matrix (`get_inverse_square_root_covariance_matrix`).

Add functionality to load additional SVO system files.

Fixed problem in the application of the flux offset for the standardised system PanSTARRS1 (PhotometricSystem.PanSTARRS1_Std). The flux offset is part of the standardisation process described in Section 2.2.1 and equation 13 in Gaia Collaboration, Montegriffo, et al., 2022. In previous versions no flux offset was applied to the flux. Flux error and magnitude were derived consistently.

Replaced SDSS filters (available as PhotometricSystem.SDSS) with those defined in Doi et al. 2010, AJ, 141, 47. Note that the standardised version (PhotometricSystem.SDSS_Std) was already based on Doi et al. 2010, AJ, 141, 47 and is therefore unchanged with respect to previous versions of GaiaXPy.