lwjgl2: default to OpenGL 3.2 when renderer is ANGLE_GLES3

[Copilot]

Using AppSettings.ANGLE_GLES3 as the renderer with the lwjgl2 backend crashes at startup with UnsupportedOperationException: Unsupported renderer: ANGLE_GLES3 because getGLVersion() has no matching case for that string and returns null.

Changes

• jme3-lwjgl/…/LwjglContext.java — override setSettings() to detect ANGLE_GLES3, emit a warning, and remap to LWJGL_OPENGL32 before copying settings. This mirrors the identical fallback already in lwjgl3's LwjglCanvas.setSettings().

@Override
public void setSettings(AppSettings settings) {
    if (AppSettings.ANGLE_GLES3.equals(settings.getRenderer())) {
        logger.log(Level.WARNING, "LWJGL2 does not support ANGLE_GLES3. "
                + "Defaulting to OpenGL 3.2 ({0}).", AppSettings.LWJGL_OPENGL32);
        settings.setRenderer(AppSettings.LWJGL_OPENGL32);
    }
    this.settings.copyFrom(settings);
}