Add polyfills for IntPtr.[Try]Parse(...), UIntPtr.[Try]Parse(...)

[Tyrrrz]

No description provided.

[Copilot]

Pull request overview

This PR adds polyfill implementations for IntPtr and UIntPtr parsing methods that were introduced in .NET 5.0, enabling their use in older frameworks (pre-.NET 5.0 versions of .NET Core, .NET Framework, and .NET Standard).

Key changes:

• Added 5 parsing methods for IntPtr: Parse (4 overloads) and TryParse
• Added 5 parsing methods for UIntPtr: Parse (4 overloads) and TryParse
• Updated documentation to reflect 10 new method signatures (total count increased from 320 to 330)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
PolyShim/Signatures.md	Updated totals and added documentation for 5 new IntPtr methods and 5 new UIntPtr methods targeting .NET 5.0
PolyShim/Net50/IntPtr.cs	Implements Parse and TryParse polyfills for IntPtr, delegating to int/long based on pointer size
PolyShim/Net50/UIntPtr.cs	Implements Parse and TryParse polyfills for UIntPtr, delegating to uint/ulong based on pointer size

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (e85c8bf) to head (d5c2949).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

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