chore: Style and SEO updates

[robin-norwood]

Update titles, descriptions, and page headers to comply with style guide and optimize for SEO

Related issue

IPE-982

Description

This updates the CDKTF documentation per our style guide and SEO optimization guidelines.

Checklist

• I have updated the PR title to match CDKTF's style guide
• I have run the linter on my code locally
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation if applicable
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works if applicable
• New and existing unit tests pass locally with my changes

[rkoron007]

Looks good! Left suggestions for ensuring consistency across title and h1s, but feel free to ignore anything that doesn't feel good!