DDS disabled by default; query_devices() wait for DDS; revise & add DDS CLI

[maloel]

I need to update the installer so the examples are still compilable, but this is a start -- please check.

• DDS is now disabled by default, even with BUILD_WITH_DDS
• if rs-dds-config detects a DDS device, it will enable DDS in realsense-config.json
• query_devices() will now wait on its first invocation per domain
• wait time can be controlled in the config, via dds/query-wait-time (default=5 seconds)
• added common/cli.h which revisits the CLI via rs2::cli
  • various variations exist, including cli_no_context, cli_no_dds
  • --eth to force DDS enabled (even if disabled in config)
  • --no-eth to force DDS disabled (even if enabled in config)
  • --eth-only to enable only SW devices (what used to be --sw-only
  • removed --sw-only
• examples and tools have been updated
  • this means they now depend on cli.h which also depends on rsutils
  • both the above are not currently installed, so that has to change

Tracked on [RSDEV-2450]