Script that extracts Soilgrids SOC based on location of sites

[Qianyuxuan]

Description

Extraction of total soil organic carbon and it's standard deviation based on the user-defined site location from SoilGrids250m version 2.0 : https://soilgrids.org

Motivation and Context

To provide SOC observations for SDA

Review Time Estimate

• [ ] Immediately
• [ ] Within one week
• x When possible

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• x New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] My name is in the list of CITATION.cff
• [ ] I have updated the CHANGELOG.md.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[Qianyuxuan]

Need to merge from the develop branch first