Enhance docs

[mroavi]

• Added a logo for the package
• Added the UAI file format descriptions
• Fixed minor issues

[codecov[bot]]

Codecov Report

Merging #46 (f2607d9) into main (57f5068) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #46   +/-   ##
=======================================
  Coverage   61.67%   61.67%           
=======================================
  Files           9        9           
  Lines         467      467           
=======================================
  Hits          288      288           
  Misses        179      179           

Impacted Files	Coverage Δ
src/TensorInference.jl	75.00% <ø> (ø)
src/utils.jl	83.50% <ø> (ø)

[GiggleLiu]

Wow, nice. I like the logo.

[mroavi]

I added a background section.