fix: respect inflection rules, humanize instead capitalize

[Paul-Bob]

Description

Avo was wrongly capitalizing resource names ignoring the acronyms configured on the inflections.rb

We start using humanize instead capitalize in many places in order to fix this issue.

Fixes #1858

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

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[github-actions]

This PR has been merged into main. The functionality will be available in the next release.

Please check the release guide for more information.