Rewrite Get Involved section in sidebar

[lparisc]

The Get-Involved section needs updated images for docs portal and the message repurposed for community contribution needs.

AC:

• new Get Involved section folder created
• index.md file with Get Involved content
• potentially add previous reference to new Get Involved

[nsjames]

Closing this ticket as we no longer have this section, nor do I think we need it.