Improve schema/types names

[yamcodes]

Clear and concise description of the problem

We should fix the schemas and type names because we're not happy how they'e called across the codebase.

Suggested solution

Making them the same, in PascalCase mostly, and without using the suffix Schema.

Basically follow colinhacks: colinhacks/zod#3285 (comment)

Alternative

• Do nothing and leave the names as they are, but we won't be too happy about it.
• Choose a different naming scheme.

Additional context

#129 (comment)
#129 (comment)

Validations

• Read the Contributing Guide.
• Read the README.md.
• Check that there isn't already an issue that requests the same feature.

[yamcodes]

@Hajbo FYI - added this issue so it's easy to track. Naturally this is outside of the roadmap

[yamcodes]

This is one of the biggest reasons for the Layered Architecture and is solved by it