Platform-independent way to build path for fonts into the sample. Now…

[snechaev]

… should work on non-Windows systems.

Prerequisites

• I have written a descriptive pull-request title
• I have verified that there are no overlapping pull-requests open
• I have verified that I am following matches the existing coding patterns and practice as demonstrated in the repository. These follow strict Stylecop rules 👮.
• I have provided test coverage for my change (where applicable)

Description

The DrawWithImageSharp were crashing on macos/net6 with the System.IO.FileNotFoundException while adding a fonts from files with the paths like the /Users/user/work/Fonts/artifacts/bin/samples/DrawWithImageSharp/Debug/net6.0/Fonts\\SixLaborsSampleAB.ttf (note the \\ delimiter before the file name). This pull request uses the Path.Combine to build the paths, so the correct platform-specific path delimiters are used.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e0eb503) 86% compared to head (1b4c949) 86%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #371   +/-   ##
=====================================
  Coverage     86%     86%           
=====================================
  Files        238     238           
  Lines      15184   15184           
  Branches    2101    2101           
=====================================
  Hits       13088   13088           
  Misses      1613    1613           
  Partials     483     483           

Flag	Coverage Δ
unittests	86% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[JimBobSquarePants]

Thanks for this!