Datasource Selection Documentation

[JenMadiedo]

Issue Number: (Link to Github Issue or Azure Dev Ops Task/Story)

DEPENDENT PR

Warning
This PR depends on commits in other PRs
DO NOT merge this PR until #203 is merged and this branch is updated against the latest dev branch

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Summary

Add a doc that details the different configs/access patterns of the various data sources.

Changes

• Add doc

Checklist

• Local Tests Passing?
• CICD and Pipeline Tests Passing?
• Added any new Tests?
• Documentation Updates Made?
• Are there any API Changes? If yes, please describe below.
• This is not a breaking change. If it is, please describe it below.

This PR Closes #<issue_number>

[codecov-commenter]

Codecov Report

Merging #216 (c859b7b) into dev (bab7550) will decrease coverage by 5.55%.
The diff coverage is 57.45%.

@@            Coverage Diff             @@
##              dev     #216      +/-   ##
==========================================
- Coverage   82.23%   76.68%   -5.56%     
==========================================
  Files          66       77      +11     
  Lines        2055     2616     +561     
  Branches      219      260      +41     
==========================================
+ Hits         1690     2006     +316     
- Misses        313      536     +223     
- Partials       52       74      +22     

Impacted Files	Coverage Δ
...yMaps/src/Client/ElectricityMapsClientException.cs	0.00% <0.00%> (ø)
...s/src/Client/ElectricityMapsClientHttpException.cs	0.00% <0.00%> (ø)
...are.DataSources.WattTime/src/WattTimeDataSource.cs	89.78% <ø> (ø)
...rces/src/Exceptions/LocationConversionException.cs	66.66% <ø> (ø)
...ools.WattTimeClient/src/WattTimeClientException.cs	100.00% <ø> (ø)
....WattTimeClient/src/WattTimeClientHttpException.cs	63.63% <ø> (ø)
...c/GSF.CarbonAware/src/Handlers/EmissionsHandler.cs	0.00% <0.00%> (ø)
...rc/GSF.CarbonAware/src/Handlers/ForecastHandler.cs	0.00% <0.00%> (ø)
src/GSF.CarbonAware/src/Models/EmissionsData.cs	0.00% <0.00%> (ø)
...lectricityMaps/src/Client/ElectricityMapsClient.cs	45.61% <45.61%> (ø)
... and 13 more

[JenMadiedo]

@vaughanknight / @Willmish ready for review

[bderusha]

[juzuluag]

👍

[vaughanknight]

Nice update and thanks for this. It's something that's come up a few times and we had discussed last week someone left a bug because they didn't know how to configure, when everything was actually working as intended... just not how they expected or were aware. Big thanks.