Add time remaining counter to blocks

[nadeemkhedr]

Context

Create a counter using (normal countdown numbers or pie countdown) for each block

Development

• use react-minimal-pie-chart for the pie countdown or search for other alternatives
• create a new component BlockTimer that has the countdown logic/ui, and will be included in the Block component
• change the pie countdown colors from green (more than 50% remaining), yellow (more than 25% remaining), red (less than 25% remaining)
• all new blocks should have time countdown of 10
• change generated words for a block to be between 4-6