docs: redo (mostly) everything

[technicallyty]

the goal with this PR is to consolidate and reorganization all information in the docs. where duplicate information was found, it was consolidated to a single place i deemed appropriate.

most notable changes:

• slimmed down the intro page. it now cuts straight to the chase: what is connect? how do i use it?
• moved all the architecture info stuff to a new learn section
• redo all validator sections
  • rework quickstart
  • rework configuration (mainly just putting ONLY what a validator would need to know about configuring)
  • rework troubleshooting into an FAQ page.
• removed chain specific page -> it now lives in advanced-setups. it only makes small callouts to what each chain (dydx, neutron) needs to setup their sidecar properly).
• removed emojis (sorry everyone) and replaced them with font-awesome icons
• changed the highlight color to blue
• etc etc..

in subsequent PR's ill add: architecture docs, metrics docs, self-service integration docs, and a roadmap section.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.53%. Comparing base (829d644) to head (c10c2bb).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #604      +/-   ##
==========================================
- Coverage   56.55%   56.53%   -0.03%     
==========================================
  Files         250      250              
  Lines       13018    13023       +5     
==========================================
  Hits         7362     7362              
- Misses       4948     4953       +5     
  Partials      708      708              

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