Add "Getting help" page

[etiennebacher]

Related to easystats/easystats#265

[codecov]

Codecov Report

Merging #798 (39a6c05) into main (67d624e) will decrease coverage by 0.01%.
The diff coverage is n/a.

❗ Current head 39a6c05 differs from pull request most recent head 6ebf98f. Consider uploading reports for the commit 6ebf98f to get more accurate results

@@            Coverage Diff             @@
##             main     #798      +/-   ##
==========================================
- Coverage   53.91%   53.90%   -0.01%     
==========================================
  Files         124      124              
  Lines       15244    15244              
==========================================
- Hits         8219     8218       -1     
- Misses       7025     7026       +1     

see 1 file with indirect coverage changes