[Font] Fix glyph bitmap alignment from SDF fonts

[Basewq]

PR Details

Fix horizontal/vertical alignment of glyphs from generated SDF bitmaps.
According to the original author -autoframe more meant for previewing rather than actual usage due to it centering the glyph to fit exactly centered on the bitmap rather than how it should be fitted on the bitmap (ie. snapped to the top-right corner).

Other change is debug build, dump the SDF bitmaps in into a sub-folder in the temp directory instead of straight into the temp directory so it's easier to delete. This does not affect the release build.

Related Issue

#2172 Only fixes the vertical alignment, not the kerning issue (which I have no clue about).

Merely an FYI, but this is the original logic for autoframe:
https://github.com/stride3d/msdfgen/blob/1af188c77822e447fe8e412420fe0fe05b782b38/main.cpp#L684-L709

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built and run the editor to try this change out.

[Eideren]

Thanks !