[#714] Improve the wizard prompts for ledger

Problem: The setup wizard support a setup with a Ledger device. It often
isn't clear from the wizard itself, however, when an action is expected
from the user, which leads to unnecessary waiting and/or confusion.

Solution: Add visible prompts that an action from user is expected.

baking/src/tezos_baking/tezos_setup_wizard.py

@@ -709,6 +709,12 @@ def import_baker_key(self):
 
                 if self.config["key_import_mode"] == "ledger":
                     try:
+                        print(
+                            color(
+                                "Waiting for your respond to the prompt on your Ledger Device...",
+                                color_green,
+                            )
+                        )
                         proc_call(
                             f"sudo -u tezos {suppress_warning_text} octez-client {tezos_client_options} "
                             f"setup ledger to bake for {baker_alias} --main-hwm {self.get_current_head_level()}"
@@ -727,6 +733,13 @@ def register_baker(self):
         print()
         tezos_client_options = self.get_tezos_client_options()
         baker_alias = self.config["baker_alias"]
+        if self.config["key_import_mode"] == "ledger":
+            print(
+                color(
+                    "Waiting for your respond to the prompt on your Ledger Device...",
+                    color_green,
+                )
+            )
         proc_call(
             f"sudo -u tezos {suppress_warning_text} octez-client {tezos_client_options} "
             f"register key {baker_alias} as delegate"

baking/src/tezos_baking/wizard_structure.py

@@ -271,9 +271,17 @@ def import_key(self, key_mode_query, ledger_app=None):
                 else:
                     print(f"Please open the Tezos {ledger_app} app on your ledger or")
                     print("press Ctrl+C to go back to the key import mode selection.")
+                    print(
+                        color(
+                            "Waiting for the Ledger Device to appear...", color_green
+                        ),
+                        end="",
+                        flush=True,
+                    )
                     ledgers_derivations = wait_for_ledger_app(
                         ledger_app, self.config["client_data_dir"]
                     )
+                    print()
                     if ledgers_derivations is None:
                         print("Going back to the import mode selection.")
                         continue
@@ -318,6 +326,13 @@ def import_key(self, key_mode_query, ledger_app=None):
                                     )
                         else:
                             baker_ledger_url = self.config["ledger_derivation"]
+
+                    print(
+                        color(
+                            "Waiting for your respond to the prompt on your Ledger Device...",
+                            color_green,
+                        )
+                    )
                     proc_call(
                         f"sudo -u tezos {suppress_warning_text} octez-client {tezos_client_options} "
                         f"import secret key {baker_alias} {baker_ledger_url} --force"