feat: add built-in model property types typdef

[achrinza]

Added typdef for:

• Any
• JSON
• Text
• GeoPoint
• DateString

Also see: microsoft/TypeScript#22865 (comment)

Signed-off-by: Rifa Achrinza [email protected]

Checklist

• Sign off your commits with DCO (Developer Certificate of Origin)
• npm test passes on your machine
• New tests added or existing tests modified to cover all changes
• Code conforms with the style guide
• Commit messages are following our guidelines

[coveralls]

Pull Request Test Coverage Report for Build 1226262292

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 84.763%

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Totals
Change from base Build 1223745102:	0.01%
Covered Lines:	7124
Relevant Lines:	8106

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💛 - Coveralls