docs: add backend docs

[joshka]

No description provided.

[codecov]

Codecov Report

Merging #213 (fa169f3) into main (509d185) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #213   +/-   ##
=======================================
  Coverage   81.66%   81.66%           
=======================================
  Files          34       34           
  Lines        6572     6572           
=======================================
  Hits         5367     5367           
  Misses       1205     1205           

Impacted Files	Coverage Δ
src/backend/crossterm.rs	0.00% <ø> (ø)
src/backend/mod.rs	33.33% <ø> (ø)
src/backend/termion.rs	28.04% <ø> (ø)
src/backend/termwiz.rs	0.00% <ø> (ø)
src/backend/test.rs	43.63% <ø> (ø)

[mindoodoo]

Do we really need the doc comments on the Backend trait methods implemented by the different backends ? My understanding is that doc comments on the methods defined in the trait definition would propagate to the traits implementation unless overriden. After skimming through them real quick it seems that for the most part they are pretty much the same as the doc comments on the trait definition.

Lmk what you think, otherwise this was greatly needed, thanks for the PR !

[joshka]

My understanding is that doc comments on the methods defined in the trait definition would propagate to the traits implementation unless overriden.

Yep - you're right, will remove the unnecessary text.

[joshka]

I really should have checked that output more thoroughly - update incoming

[mindoodoo]

LGTM