feat(konsistent): support exact top-level TypeScript type constraints alternatively to JSON schema

[felixarntz]

Pull Request Description

Allows declaration and export predicates to verify complete TypeScript type expressions, alternatively to the already supported JSON Schema shapes.

Relevant technical choices

• Adds a mutually exclusive type alternative to schema for declareTypes, exportTypes, declareConstants, and exportConstants.
• Compares template-expanded type expressions directly against source annotations or type alias expressions without resolving semantic equivalence.
• Keeps from, schema, and type mutually exclusive and removes unsupported from usage from exportConstants.
• Updates generated schemas, documentation, unit coverage, and e2e fixtures.

Checklist

• All commits are signed (PRs with unsigned commits cannot be merged)
• Tests have been added / updated
• A changeset has been added (run pnpm changeset in the project root if package files were modified)
• I have reviewed this pull request (self-review)