Address review comment

- Replaced `handle_sigint` to the `install_signal_handler`

Signed-off-by: Michael Orlov <michael.orlov@apex.ai>

Author: MichaelOrlov

docs/design/README.md

@@ -111,9 +111,9 @@ via pressing `Ctrl+C`. This signal handling could overlap with registered specif
 handler on upper level or inside keyboard handler's clients. To avoid this overlap keyboard handler
 will save previous `SIGINT` handler and call it after processing its own signal handler. It will 
 also restore the previous `SIGINT` handler in destructor. The keyboard handler constructor has an
-optional parameter `bool handle_sigint` which by default is set to `true`. If this parameter
-is set to `false`, keyboard handler will not register its own `SIGINT` handler and will not
-restore previous `SIGINT` handler in destructor. This could be useful in cases when client
+optional parameter `bool install_signal_handler` which by default is set to `true`. If this
+parameter is set to `false`, keyboard handler will not register its own `SIGINT` handler and
+will not restore previous `SIGINT` handler in destructor. This could be useful in cases when client
 code already registered its own `SIGINT` handler and don't want to overlap it with keyboard
 handler's one. In this case client code should be responsible for restoring terminal input in
 canonical mode after abnormal program termination via pressing `Ctrl+C` by calling static method
@@ -249,4 +249,3 @@ issues:
    `F1..F12` and other control keys.
  - Windows implementation not able to detect `CTRL` + `ALT` + `key` combinations.
  - Windows implementation not able to detect `ALT` + `F1..12` keys.
-