status: extend to provide all camera options and properties in JSON payload

- control: add `device_option_is_equal`
- libcamera: provide human readable configurable options
- v4l2: include camera control values
- libcamera: store all applied controls
- libcamera: use `device_option_is_equal`

util/opts/control.h

@@ -1 +1,4 @@
+#include <stdbool.h>
+
 int device_option_normalize_name(const char *in, char *out);
+bool device_option_is_equal(const char *a, const char *b);