refactor: design of various quick link sections + code blocks

[Valastiri]

Summary

• Changes the style of how we do "quick links" or on-page table of contents. Helps with mobile users and also a cleaner look over using .md-button or a Markdown list for the topics included in a section.
• Updated code blocks to have an associated title (to set a standard) and define what type of file if required.
• Includes a new stylesheet toc-tables.css to override the main table styling site-wide.
• Additional out-of-scope change: updated the simulated list on the FBW Overview Page

Notes / TODO

• Decided not to use the new format for the beginner guide.
• Finish other pages that require style changes
• Double-check untitled code blocks

Location

This PR touches every overview page with a topics list and any subsection that has a topics list.

Sample Images

Discord username (if different from GitHub): Valastiri#8902

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