Backport snapshot mode and dual session features

[ShravanDeva5327]

List of PRs to be backported:

1. Snapshot mode:
   • Allow creating snapshot sessions #195
   • Add example launch files for snapshot mode #206
2. Dual Session:
   • Add support for starting tracing at runtime #191
   • Add launch files with preconfigured dual session #196
3. Documentation:
   • Add documentation for snapshot mode and dual session #207