Renamed keypath to JSONKeyPath prevent collision.

[bsneed]

Fixes #393

[codecov]

Codecov Report

❌ Patch coverage is 94.44444% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 71.03%. Comparing base (bd37869) to head (1c8d809).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
Sources/Segment/Utilities/JSONKeyPath.swift	93.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #406      +/-   ##
==========================================
- Coverage   71.05%   71.03%   -0.03%     
==========================================
  Files          49       49              
  Lines        4930     4930              
==========================================
- Hits         3503     3502       -1     
- Misses       1427     1428       +1     

Files with missing lines	Coverage Δ
Sources/Segment/Timeline.swift	86.32% <100.00%> (ø)
Sources/Segment/Utilities/JSON.swift	84.91% <100.00%> (ø)
Sources/Segment/Utilities/JSONKeyPath.swift	91.66% <93.33%> (ø)

... and 1 file with indirect coverage changes

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