[Scala][Finch] Further enhancements to the Finch generator

[wing328]

Description

Here is a list of suggested enhancements to Scala Finch generator by @jfraudeau

• Add support for Cookie parameters (OAS 3.0)
• Query parameters and Header that are not interpreted as strings
• All arities aren't always handled
• Improve code quality

Swagger-codegen version

Latest master

Related issues/PRs

#6809

Suggest a fix/enhancement

If anyone wants to work on these enhancements or have other suggestions, please reply to let us know.

[erikwj]

@wing328 I'd like to work on it, was working on a similar solution to fix the params and headers, also added the security parameters from OAS

[wing328]

@erikwj thank you 🙇

Let us know if you need help with the PR.

[matteomazza91]

Since

• the commit f0b07b2 added the support for security definitions and
• the commit 1b90a05 exploit it
  I want notify that I create the PR feat: add cookie auth for security scheme #7537. It extends the security definitions with cookie auth (OpenApi 3.0.0).
  I hope it can be useful if you want to extend the FinchServerCodegen