Asteca

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- Downgraded the versions of almost all the required packages to play nice with
Google Colab
- Fix `AttributeError: ptp was removed from the ndarray class in NumPy 2.0. Use
np.ptp(arr, ...) instead.` for newer versions of `numpy`
- Allow `isochrones` to load single files, not just paths to folders
- Added an update notifier to `__init__.py` (added `requests` as requirement)

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- Faster (and cleaner) :py:meth:`asteca.membership.Membership.fastmp` and
:py:meth:`asteca.membership.Membership.bayesian`
- Change the normalization constant used in ``fastmp`` (from 2*median to IQR)
- Add ``kde_2d`` method to :py:meth:`asteca.cluster.Cluster.get_center`
- Fix ``knn_5d`` method to better handle large frames
- Minor fixes to center and total masses estimation

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- Simpler error distribution function
- Convert `dataclass` to `class` (simpler API documentation)

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- Add :py:meth:`asteca.membership.Membership.bayesian` method decontamination algorithm
- Move plot functions to its own module
- Removed ``masses_binary_probs`` method from the
:py:class:`asteca.synthetic.Synthetic` class
and added the methods: :py:meth:`asteca.synthetic.Synthetic.get_models`,
:py:meth:`asteca.synthetic.Synthetic.stellar_masses`,
:py:meth:`asteca.synthetic.Synthetic.binary_fraction`,
:py:meth:`asteca.synthetic.Synthetic.cluster_masses`, to estimate individual masses,
total binarity fraction, and total masses (see: :ref:`masses_and_binarity`)
- Added the :py:meth:`asteca.cluster.Cluster.get_nmembers` method to estimate the
number of members for a cluster embedded in a field.

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- Fix small issue with documentation in v0.5.3

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- Added the :py:meth:`asteca.membership.Membership.fastmp` method
- Added the :py:meth:`asteca.cluster.Cluster.get_center` method