feat(schema-dsl): add @Resource, @field, @id decorators

[MehulKChaudhari]

• Adds the @warp-drive/schema-dsl package with @resource, @field, and @id decorators for defining schemas as decorated TypeScript classes
• Decorators are no-ops at runtime a Vite plugin (schemaDSL()) compiles them at build time via Babel AST into
  ResourceSchema objects exposed through a virtual:warp-drive-schemas module
• Supports both modern (Polaris) and legacy schema output formats
• Includes tests and initial documentation