Shims for C# char as TS string

[ArcadeMode]

add shims to change marshalling of chars to be strings instead of numbers.

Apparently char was indended to be represented as number (dotnet/runtime#123187) so it was a docs issue that string was mentioned as output type.
The end user most likely wants to work with strings when dealing with chars, so this PR is to do the simple transformations from number back to char.

• render number types on interop boundary
• convert to string in user api
• add TS render tests
• extend 'e2e' to get/set properties to test method interactions

[github-actions]

Test Results

349 tests   349 ✅  13s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit 38e9ac9.

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