Adds cards showing all integration libraries to the integrations page

[discdiver]

Closes #13809

Modifies the catalog creation script and template.
We rarely add integrations, so running this script manually and copying over the created HTML for now.
Also moves redundant contributing section out of integrations.

Example

Checklist

• This pull request references any related issue by including "closes <link to issue>"
  • If no issue exists and your change is not a small fix, please create an issue first.
• If this pull request adds new functionality, it includes unit tests that cover the changes
• This pull request includes a label categorizing the change e.g. maintenance, fix, feature, enhancement, docs.

For documentation changes:

• This pull request includes redirect settings in mint.json for files that are removed or renamed.

For new functions or classes in the Python SDK:

• This pull request includes helpful docstrings.
• If a new Python file was added, this pull request contains a stub page in the Python SDK docs and an entry in docs/mint.json navigation.

[billpalombi]

Looks great!