feat: add ParsePush notifications

[cbaker6]

New Pull Request Checklist

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

Issue Description

The SDK currently can't send push notifications.

Related issue: #n/a

Approach

Enable APN and FCM push notifications in the SDK. This should only be used when taking advantage of the Swift SDK on a server. To enable this feature, Query is made to conform to Codable. Make QueryWhere public.

The are some bugs on the server the SDK codes around to make this feature possible:

• https://github.com/parse-community/parse-server/issues/8029
• https://github.com/parse-community/parse-server/issues/8030

TODOs before merging

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

[parse-github-assistant[bot]]

Thanks for opening this pull request!

• 🎉 We are excited about your hands-on contribution!

[codecov[bot]]

Codecov Report

Merging #371 (dcfe0bf) into main (c32e269) will increase coverage by 0.48%. The diff coverage is 97.74%.

@@            Coverage Diff             @@
##             main     #371      +/-   ##
==========================================
+ Coverage   88.51%   89.00%   +0.48%     
==========================================
  Files         125      137      +12     
  Lines       12970    13402     +432     
==========================================
+ Hits        11481    11929     +448     
+ Misses       1489     1473      -16     

Impacted Files	Coverage Δ
Sources/ParseSwift/API/Responses.swift	95.00% <ø> (ø)
Sources/ParseSwift/Parse.swift	98.77% <ø> (ø)
Sources/ParseSwift/Types/ParseAnalytics.swift	96.24% <ø> (-0.17%)	:arrow_down:
Sources/ParseSwift/Types/ParseSchema+combine.swift	100.00% <ø> (ø)
Sources/ParseSwift/Types/ParseSchema.swift	97.83% <ø> (ø)
Sources/ParseSwift/Types/Pointer.swift	98.41% <50.00%> (ø)
Sources/ParseSwift/Coding/AnyCodable.swift	65.71% <90.00%> (+6.69%)	:arrow_up:
Sources/ParseSwift/Coding/AnyEncodable.swift	62.84% <90.00%> (+10.54%)	:arrow_up:
...es/ParseSwift/Protocols/ParsePushPayloadable.swift	90.00% <90.00%> (ø)
...s/ParsePushPayload/Apple/ParsePushAppleSound.swift	90.00% <90.00%> (ø)
... and 30 more

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