docs: main page updates around support

[dreamorosi]

Description of your changes

As described in #1132 there are some changes related to how to support the project that were made in the Python version of Powertools and that needed to be replicated here. This PR addresses that action item.

This PR also cover some minor housekeeping in 3 more sections of the docs.

How to verify this change

You can verify this change by running docs-buildDockerImage & docs-runLocalDocker while in the root folder (requires Docker).

Or check the screenshots provided below (only for main page):

Related issues, RFCs

Issue number: #1132

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding changes to the examples
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published in downstream module
• The PR title follows the conventional commit semantics

Breaking change checklist

N/A

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[heitorlessa]

reading...

[heitorlessa]

LGTM, only one part to remove (leftover from Python docs)

[dreamorosi]

@heitorlessa thank you for the review & for spotting the leftover line about pydantic.

I have committed your suggestion!