Added placeholder for Sphinx documentation

[bmort]

Description:

• Added placeholder for Sphinx / Read the Docs documentation.
• Added pipenv package management to top level repo folder.

Types of changes

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[codecov]

Codecov Report

Merging #99 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #99   +/-   ##
=======================================
  Coverage   84.04%   84.04%           
=======================================
  Files          61       61           
  Lines        2846     2846           
  Branches      237      237           
=======================================
  Hits         2392     2392           
  Misses        402      402           
  Partials       52       52

Impacted Files	Coverage Δ
...configuration_db/sip_config_db/_config_db_redis.py	81.77% <ø> (ø)	⬆️

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