Documentation update for resampler relocation and removed relative path imports

[alisnwu]

closes #137

@bobleesj could you check this PR before I ping Simon, closes the last issue in 3.5.1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.17%. Comparing base (08917a2) to head (b1cc3c7).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #167   +/-   ##
=======================================
  Coverage   99.17%   99.17%           
=======================================
  Files           7        7           
  Lines         243      243           
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  Hits          241      241           
  Misses          2        2           

[bobleesj]

@alisnwu Thanks! First, just to double check, are the modifications generated dynamically using the API workflow in the cookiecutter repo README instructions? If not, let's use that and please also attach a screenshot here to ensure that it works after you've done

cd doc && make html && open build/html/index.html && cd ..

For the example, have you followed the instructions that you've tried?

[bobleesj]

why was this added?

[alisnwu]

sphinx gave an error WARNING: autodoc: failed to import module 'gridutils' from module 'diffpy.utils.wx'; the following exception was raised: No module named 'wx' [autodoc.import_object]
So I followed the cookiecutter instructions for that error

[bobleesj]

@alisnwu this PR isn't ready for review right? Please let us know since it's in my notification box. Please make this PR title is descriptive so that we get a sense of what is being worked on from the title alone. Please use the PR/commit guide provided earlier by me.

[alisnwu]

No sorry about that, I'll also close this and reopen after issues are fixed