Buzzer cli command

[ivanbarsukov]

What's new

• Added buzzer cli command
• Added function for parsing note frequency
• Added function for parsing time and converting it to ms
• Added function for parsing float argument (HELP needed. "%f" is not working for sscanf. Temporarily it reads int)

Verification

• Open Flipper cli
• Run buzzer freq 659 or buzzer note e5 for playing e5 for 100 ms (default value)
• Run buzzer freq 659 5s or buzzer note e5 5s for playing e5 for 5 s
• Run buzzer freq 659 0 or buzzer note e5 0 for playing e5 in background and then buzzer off to turn it off

Checklist (For Reviewer)

• PR has description of feature/bug or link to Confluence/Jira task
• Description contains actions to verify feature/bugfix
• I've built this code, uploaded it to the device and verified feature/bugfix