Suggest bypass blocks for long code blocks

[ChrisXKeroack]

Describe the bug
Lengthy code blocks are a lot of unskippable content for a screenreader user to have to listen to / navigate through. For example, see code blocks in use on https://openfl.readthedocs.io/en/latest/running_the_federation_with_gandlf.html .

Suggest use of a skip link that allows the keyboard user to move focus past the code block and to the next interactive element after that code block.

Desktop:
This issue is not OS or browser specific, but for tracking purposes, testing was done on Win11, in Edge Version 114.0.1823.58 (Official build) (64-bit).

Smartphone:
This issue is not device, OS, or browser specific.

Additional context
This is an accessibility issue, please annotate this bug with the 'accessibility' label.