Roadmap for GUI

[SumanthRH]

• [x] Start with asciichart and integrate with brick
• [x] Write a progress bar widget that gets updated in real time
• [x] Write up the structs for other widgets in Ali - Parameters, Latencies, Bytes, Status Codes, Errors, Others (which do we choose?)
• [x] Update asciichart plot to get updated in real-time
• [x] Combine different widgets into one interface

[SumanthRH]

More tasks:

• [x] Add support to read in from channels
• [x] Add unit tests
• [x] Combine progress bar with updated asciichart