docs: add required dependencies (xarray-contrib#138)

docs/installation.rst

@@ -1,24 +1,48 @@
 Installation
 ------------
 
-The ``xeofs`` package can be installed using either the ``conda`` package manager or ``pip``.
+Required Dependencies
+~~~~~~~~~~~~~~~~~~~~~
 
-Conda
-~~~~~~~~~~~~~~~~~~
+The following packages are required dependencies:
 
-If you are using the ``conda`` package manager, installation is recommended via the ``conda-forge`` channel:
+**Core Dependencies**
+
+* Python (3.10 or 3.11)
+* `numpy <https://www.numpy.org/>`__ 
+* `pandas <https://pandas.pydata.org/>`__ 
+* `xarray <http://xarray.pydata.org/>`__ 
+* `scikit-learn <https://scikit-learn.org/stable/>`__ 
+* `statsmodels <https://www.statsmodels.org/stable/index.html>`__ 
+
+**For Performance**
+
+* `dask <https://dask.org/>`__ 
+* `numba <https://numba.pydata.org/>`__ 
+
+**For I/O**
+
+* `netCDF4 <https://unidata.github.io/netcdf4-python/netCDF4/index.html>`__ 
+* `zarr <https://zarr.readthedocs.io/en/stable/>`__ 
+* `xarray-datatree <https://github.com/xarray-contrib/datatree>`__
+
+**Miscellaneous**
+
+* `typing-extensions <https://pypi.org/project/typing-extensions/>`__ 
+* `tqdm <https://tqdm.github.io/>`__ 
+
+Instructions
+~~~~~~~~~~~~
+
+The ``xeofs`` package can be installed using either the `conda <https://conda.io/projects/conda/en/latest/user-guide/getting-started.html>`__ 
+package manager 
 
 .. code-block:: bash
 
     conda install -c conda-forge xeofs
 
-PIP
-~~~~~~~~~~~~~~~~
-
-Alternatively, you can also install ``xeofs`` using the Python package installer ``pip``:
+or the Python package installer `pip <https://pip.pypa.io/en/stable/getting-started/>`__
 
 .. code-block:: bash
 
     pip install xeofs
-
-Make sure to install the package in an appropriate virtual environment to avoid conflicts with other packages or system-wide Python installations.