Function getControlProperty

getControlProperty(
    page: MatcherPage,
    controlId: string,
    propertyName: string,
): Promise<unknown>
Retrieves a control property via page.evaluate() using the bridge.
Parameters
- page: MatcherPage
  The page (or minimal MatcherPage) to evaluate on.
- controlId: string
  The ID of the UI5 control.
- propertyName: string
  The property to read (e.g., 'text', 'visible').
Returns Promise<unknown>
The property value from the browser context.
Intent
Read a single property value from a UI5 control for matcher assertions.

Capability
matchers.getControlProperty

Guarantee
On success, returns the property value from the control (may be undefined for missing properties).

Remarks
Ensures the bridge is injected, then executes the getter method for the given property on the target control. Mirrors the logic from ClassicUI5Adapter.getControlProperty().
Example
```
const value = await getControlProperty(page, 'btn1', 'text');
```
- Defined in matchers/matcher-utils.ts:92