cli: Buzzer command (#4006)

* Add args_read_float_and_trim function

* Add args_read_duration function

* Add notes_frequency_from_name function

* Add cli_sleep function and sleep CLI command

* Update CLI top command to use cli_sleep

* Add buzzer CLI command

* toolbox: make args_read_duration less convoluted

* notification: make notification_messages_notes_frequency_from_name less convoluted

* unit_tests: better float checking

* fix formatting and f18

---------

Co-authored-by: Anna Antonenko <portasynthinca3@gmail.com>
Co-authored-by: hedger <hedger@nanode.su>

applications/services/cli/application.fam

@@ -49,3 +49,11 @@ App(
     requires=["cli"],
     sources=["commands/subshell_demo.c"],
 )
+
+App(
+    appid="cli_buzzer",
+    apptype=FlipperAppType.PLUGIN,
+    entry_point="cli_buzzer_ep",
+    requires=["cli"],
+    sources=["commands/buzzer.c"],
+)