test: comprehensive unit-test coverage for sx-aware auto-detection

Expands the wrapped-component-interface test suite to 43 cases organised
by intent, documenting both supported patterns and known limitations of
the static walker. Sections:

  - Positive: prop type signatures
    * function declarations / arrow / function expression
    * required vs optional sx
    * string-literal property keys
    * any-typed sx values
    * default exports
    * non-exported declarations (the consumer's import is what makes it
      'exported' for the codemod's purposes)

  - Positive: type alias / interface resolution
    * single alias hop, intersection (Text-style generic component),
      nested chain, interface
    * union types where one branch carries sx
    * parenthesised types
    * cyclic aliases (no infinite loop)

  - Negative: sx absent or out of reach
    * plain components, Omit<…, "sx">, Pick utility narrowing
    * sx as a string literal value of an unrelated prop
    * sx mentioned only in a comment
    * components with no parameters / no parameter type annotation
    * sx on a sibling component
    * unknown local name
    * package-style imports (no source path on disk)

  - Negative: documented walker limitations
    * React.FC<Props> generic on the variable annotation
    * forwardRef HOC wrapper
    * interface 'extends' clauses
    * type imports across files

  - File-system edge cases
    * missing file, empty file, syntax error (no throw)
    * extension probing for bare absolute paths

  - Adapter override semantics
    * true / false / undefined fallthrough
    * package-import override path
    * useSxProp disabled
    * missing or empty importMap

  - Caching
    * repeat lookups stay consistent
    * (file, componentName) keying — different components in same file
      do not poison each other

Co-authored-by: Kenneth Skovhus <skovhus@users.noreply.github.com>

Author: cursoragent