Add initial helper functions for finding and listing endpoints

[Cadair]

No description provided.

[codecov]

Codecov Report

Merging #49 into master will increase coverage by 0.16%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #49      +/-   ##
=========================================
+ Coverage   97.13%   97.3%   +0.16%     
=========================================
  Files          19      20       +1     
  Lines         944    1002      +58     
=========================================
+ Hits          917     975      +58     
  Misses         27      27

Impacted Files	Coverage Δ
dkist/utils/globus/endpoints.py	100% <100%> (ø)
dkist/utils/globus/auth.py	98.79% <100%> (+0.18%)	⬆️
dkist/utils/globus/__init__.py	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8cdeeec...021dac5. Read the comment docs.