[CO-322] Fix Swagger names in the spec

[parsonsmatt]

Description

The previous swagger spec had names like WalletResponse<[Wallet]> where <[]> are banned characters. This PR replaces them with URI friendly characters -- specifically, the above would now be WalletResponse-_Wallet_.

Linked issue

https://iohk.myjetbrains.com/youtrack/issue/CO-322

Type of change

• 🐞 Bug fix (non-breaking change which fixes an issue)
• [~] 🛠 New feature (non-breaking change which adds functionality)
• [~] ⚠️ Breaking change (fix or feature that would cause existing functionality to change)
• [~] 🏭 Refactoring that does not change existing functionality but does improve things like code readability, structure etc
• 🔨 New or improved tests for existing code
• [~] ⛑ git-flow chore (backport, hotfix, etc)

Developer checklist

• I have read the style guide document, and my code follows the code style of this project.
• If my code deals with exceptions, it follows the guidelines.
• I have updated any documentation accordingly, if needed. Documentation changes can be reflected in opening a PR on cardanodocs.com, amending the inline Haddock comments, any relevant README file or one of the document listed in the docs directory.
• CHANGELOG entry has been added and is linked to the correct PR on GitHub.

Testing checklist

• I have added tests to cover my changes.
• All new and existing tests passed.

QA Steps

Screenshots (if available)

[KtorZ]

We don't need this import right?

[KtorZ]

I always try to use Control.Lens.At instead of bringing in this dep :/ ...

[KtorZ]

Or Control.Lens.Indexed in that case actually

[parsonsmatt]

I needed to get access to the keys of the map and couldn't figure out how to do that with lens :\

[erikd]

LGTM!