Jeremy lig 3948 make ssl docs more distinct

[japrescott]

closes lig-3948

• replace logos to highlight we are talking about Lightly SSL and not about "Lightly"
• replace all self-references to lightly with Lightly SSL or clarify when needed that its Lightly Worker
• add banner referring to the Lightly Worker docs
• pimp footer and add link to github and worker docs

-> some formatting seem to be off but most likely due to it locally being built

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (3f3714d) 85.41% compared to head (9041384) 85.41%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1394   +/-   ##
=======================================
  Coverage   85.41%   85.41%           
=======================================
  Files         130      130           
  Lines        5465     5465           
=======================================
  Hits         4668     4668           
  Misses        797      797           

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[michal-lightly]

This is really great! Left only minor comments.

[michal-lightly]

LGTM, thanks!