162 task percent of total battery power available shown

[TheJeffreyKuo]

Changes

Added Mqtt topic defs for DC Current and Max DC Current, and subscribed both topics. Power draw percentage is computed as as abs(DC_Current) / abs(Max_DC_Current_Target) * 100. Battery components were created for both the efficiency screen and performance screen.

Notes

• The UI is temporary as we figure out more space with other new components that we are adding.
• There might be duplicated topics with the regen PR that can be resolved at merge.

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Closes #162