Color scheme, time source table

[cikzh]

Code best reviewed per commit, visuals can be best reviewed in one go.

• Changed the color scheme: color system choosen based on split complentary and analogous colors. See: https://maketintsandshades.com/#colors=fdc153,fd6c53,e4fd53,53e4fd&hashtag=0&steps=10
• Removed the large header on top of the page and made sure it is clear where you are on every page based on content and h2 headers
• Time source cards are gone and replaced by a table, consistent with the rest of the UI

In draft, because we should move most header blocks to the sections

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.51%. Comparing base (999e006) to head (c81092d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #443   +/-   ##
=======================================
  Coverage   70.51%   70.51%           
=======================================
  Files          67       67           
  Lines       14311    14311           
=======================================
  Hits        10091    10091           
  Misses       4220     4220           

Flag	Coverage Δ
beta	70.75% <ø> (+0.02%)	⬆️
fuzz	60.91% <ø> (+0.11%)	⬆️
fuzz-client_request	35.35% <ø> (ø)
fuzz-key_exchange_response	41.30% <ø> (ø)
fuzz-record	35.93% <ø> (+0.11%)	⬆️
fuzz-server_information_response	24.97% <ø> (-0.47%)	⬇️
msrv	70.42% <ø> (ø)
stable	70.78% <ø> (+0.02%)	⬆️
test	70.45% <ø> (ø)
x86_64-unknown-linux-gnu	70.43% <ø> (-0.03%)	⬇️
x86_64-unknown-linux-musl	70.75% <ø> (ø)

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