Feature: added properties to VortexScanner

[sherlockbeard]

added property to VortexScanner

fixes #5454

import vortex as vx

vx.io.write(vx.array([{"col1": "a string"}]), 'foo.vortex')
x = vx.open('foo.vortex').to_dataset().scanner().projected_schema

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 84.28%. Comparing base (fdafb28) to head (006887f). :warning: Report is 1 commits behind head on develop.

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[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #5500 will improve performances by 12.72%

_{Comparing sherlockbeard:scanner_property_addition (006887f) with develop (fdafb28)}

Summary

⚡ 1 improvement
✅ 1157 untouched
⏩ 617 skipped[^skipped]

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	encode_specialized	2.7 ms	2.4 ms	+12.72%
[^skipped]: 617 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

[connortsui20]

(dont worry about the lint error, thats a separate problem)