[typekit] getPlausibleName doesn't handle arrays, nested types, or scalars properly

[bterlson]

Describe the bug

Given a type like string[], getPlausableName should probably return StringArray or somesuch. Right now it just returns Array.

Given a type like string[][], I would expect StringArrayArray but we just get stringArray.

Given a type like Foo, we get stringFoo, but we should get StringFoo (since an array of scalars is not a scalar).

Reproduction

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Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[maorleger]

Look at openAPI emitter for prior work, fix the known cases above