Text enhancements in the docs

[NehaGujar1]

Is this a BUG REPORT or FEATURE REQUEST?

BUG REPORT

What happened:
Difficulty in readability of certain names
Non-uniform text highlights and font sizes
Changing to dark mode readability of purple text boxes reduces
What you expected to happen:
Renaming of chaos-infrastructure-installation to Chaos Infrastructure Installation
Highlighting entire text "continuously verifying if your service is resilient against faults"
Uniformity in font size
Dark mode toggle should not change the box/text color for Note
How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?: