Add files via upload RSX zip files which can be used to download climateR dataset within QGIS

[Heed725]

Summary

This pull request adds RSX scripts that enable downloading and accessing ClimateR datasets directly within QGIS. These scripts integrate with QGIS to streamline climate data workflows for users who prefer a GIS interface.

Features Added

• RSX files for QGIS that allow automated downloading of ClimateR datasets.
• Instructions for using the RSX scripts in QGIS.
• Examples included to demonstrate workflow with sample ClimateR datasets.

Motivation

Many users of ClimateR may prefer working in QGIS for spatial analysis. Adding these RSX scripts simplifies dataset access and ensures consistent integration between R-based climate data and GIS workflows.

Notes

• The scripts are fully compatible with the latest ClimateR dataset formats.
• Users should ensure that the ClimateR R package is installed and properly configured for these scripts to function.

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This PR effectively extends ClimateR functionality to QGIS users without modifying the core R package, preserving backward compatibility.