v23.4

Changelog:

• Added a new mechanism to compute in parallel the counting of the unique pixel values (thematic classes)
  required for stratified sampling design and analysis using area based proportion.
• Added the option for systematic sampling to set the initial inset from left-top corner using a random value.
• Added the external library Dask in the plugin to allow parallel computing in some processes.
• Added all the tests to verify and check the accuracy assessment results in the different sampling types.
• Fixed an issue for the standard deviation in the overall accuracy for the post-stratify estimators
• Fixed the slot event for load the file and select the layer in the ComboBox for Qgis layers
• Adjusted all the exercises with the all configurations of the plugin and added the missing ones.
• All commits in: https://github.com/SMByC/AcATaMa/commits