chore(migrations): json schemas upkeep

[damyanpetev]

Ran generation on JSON Schema files and removed obsolete one for theme props (theme changes in use).

Additional information (check all that apply):

• Bug fix
• New functionality
• Documentation
• Demos
• CI/CD

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them

The base branch was changed.

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[Copilot]

Pull request overview

This PR performs maintenance on JSON schema files by regenerating them and removing an obsolete schema file (theme-props.schema.json) that is no longer used due to theme-related changes in the codebase.

Key Changes:

• Removed the obsolete theme-props.schema.json file
• Added missing required fields to various schema definitions for better validation
• Reordered enum values alphabetically in multiple schemas

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
theme-props.schema.json	Removed obsolete schema file for theme properties
theme-changes.schema.json	Added required fields and reordered enum values alphabetically
selector.schema.json	Reordered ElementType enum values alphabetically
index.ts	Updated schema generation command comment
imports.schema.json	Restructured to add definitions wrapper and required fields
class.schema.json	Updated JSON schema version from draft-06 to draft-07
binding.schema.json	Reordered ElementType enum values alphabetically

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