Adds tests for gis/simple_tag

[r-akemii]

This PR adds a test for _gis/simpletag.

In this PR we:

• Added tests for available operations with polygons, linestrings, and points
• Modified conftest.py to create an example with Coquimbo network in a temporary folder
• Updated the documentation for gistools.rst and added an image with the UI
• Removed the deprecation warning related to the QgsCoordinateReferenceSystem constructor. See: https://qgis.org/pyqgis/3.34/core/QgsCoordinateReferenceSystem.html
• Fixed a bug for touching in gis\simple_tag_procedure.py