* Moved Signal CMD to Signal directory
* Removed config dir and fixed a parameter typo
* removed attempt to create ssl directory
* Update Signal build configuration
* move Signal documentation to its directory
* removed unused variables
* test build management and signal
* User run as subcommand to execute the signal daemon
* chore: update signal gRpc
* chore: add Signal keep alive params and policy
* feature: add signal TLS support
* refactor: move signal Dockerfile to the corresponding folder
Co-authored-by: braginini <m.bragin@wiretrustee.com>