Remove extra TOC (DataDog#6504)

Merge pull request DataDog#6502 from DataDog/gus/overview-title

Removing overview header (as it's the only one)

Merge pull request DataDog#6384 from DataDog/zach/editPage

Edit this page + ToC design

fixing attributes (DataDog#6491)

fixing link (DataDog#6490)

fix frontmatters (DataDog#6487)

Add community Terraform library (DataDog#6486)

Merge pull request DataDog#6477 from DataDog/gus/issue-text-fix

Fixing text displayed for FR issue template

adding alias to fix ci (DataDog#6483)

wording fix (DataDog#6482)