docs(title): add documentation to title

[Valentin271]

Description

This adds documentation for Title and Position.

Relates to #386.

Rendered documentation

[codecov]

Codecov Report

Merging #443 (b40f4a1) into main (14eb6b6) will not change coverage.
Report is 3 commits behind head on main.
The diff coverage is n/a.

❗ Current head b40f4a1 differs from pull request most recent head a2001df. Consider uploading reports for the commit a2001df to get more accurate results

@@           Coverage Diff           @@
##             main     #443   +/-   ##
=======================================
  Coverage   90.42%   90.42%           
=======================================
  Files          40       40           
  Lines       11081    11081           
=======================================
  Hits        10020    10020           
  Misses       1061     1061           

Files Changed	Coverage Δ
src/title.rs	100.00% <ø> (ø)