[CI environment] Retrieve main resource type leveraging api specs

[eriqua]

Description

Closes #3475

Update set-module readme to retrieve main resource type from module folder path leveraging api specs json file
Works with both singular and plural module folder names, hence can be merged to main

Should be merged after #3507 #3510 #3512

Pipeline references

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Pipeline

Type of Change

Please delete options that are not relevant.

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Update to documentation

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code