Text System Overhaul

[mwagnerEE]

Pull Request Template

Note

All Pull Requests must be submitted to the default branch: develop

Description

This is a rewriting of the text parsing and rendering to allow offset attributes on tspan elements.

Fixes # 108

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

No formal tests, just comparing renders in wpf to renders of the same svg in chrome

Please describe the tests that you ran to verify your changes.

• .NET Framework, Version 4.0
• .NET Framework, Version 4.5
• .NET Framework, Version 4.6
• .NET Framework, Version 4.7
• .NET Framework, Version 4.8
• .NET Core, Version 3.1
• .NET 6 ~ 8
• All Included Samples

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works

[jogibear9988]

LGTM