[MISC] Code style consistency
[BUGFIX] Fix the intendation of multi-line code examples
[BUGFIX] Optimize the initialization process for the rainbow code highlighter

This will fix the initial scroll to #hash bug where the offsetTop was falsy due to the code blocks where still calculated and some unnecessary layout processing was done
[DOCS] Add consistent intendation for the code examples
[TASK] Add an additional body class if the current page is the root/entry file