feat: Add new health statuses and delay attempts

[cbaker6]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Parse Server 6.0.0 adds new health statuses which are currently unsupported by Parse Swift

Approach

Support new server status checks and delays.

TODOs before merging

• Add tests
• Add entry to changelog
• Add changes to documentation (guides, repository pages, in-code descriptions)

[codecov]

Codecov Report

Merging #43 (948335f) into main (cabf542) will increase coverage by 0.00%.
The diff coverage is 97.05%.

@@           Coverage Diff           @@
##             main      #43   +/-   ##
=======================================
  Coverage   90.28%   90.29%           
=======================================
  Files         161      161           
  Lines       16167    16243   +76     
=======================================
+ Hits        14597    14666   +69     
- Misses       1570     1577    +7     

Impacted Files	Coverage Δ
Sources/ParseSwift/API/Responses.swift	95.00% <ø> (ø)
Sources/ParseSwift/LiveQuery/ParseLiveQuery.swift	74.52% <66.66%> (-2.03%)	⬇️
Sources/ParseSwift/Types/ParseHealth+combine.swift	93.33% <92.30%> (-6.67%)	⬇️
Sources/ParseSwift/Extensions/URLSession.swift	87.73% <98.48%> (+5.84%)	⬆️
Sources/ParseSwift/API/API+Command+async.swift	100.00% <100.00%> (ø)
Sources/ParseSwift/API/API+Command.swift	89.90% <100.00%> (+0.06%)	⬆️
...ParseSwift/API/API+NonParseBodyCommand+async.swift	100.00% <100.00%> (ø)
...urces/ParseSwift/API/API+NonParseBodyCommand.swift	82.14% <100.00%> (+0.21%)	⬆️
Sources/ParseSwift/Parse.swift	98.92% <100.00%> (+0.01%)	⬆️
Sources/ParseSwift/Types/ParseConfiguration.swift	100.00% <100.00%> (ø)
... and 7 more

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