WIP Histogram
WIP Scatterchart

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>

HPCC-7985 Add generic visualisations to ECL Watch

Initial commit with:
Bar Chart
Pie Chart
Donut Chart
Slider Control
Force Directed Graph
Cooccurance Graph
Histogram
Scatter Plot

Fixes HPCC-7985
Fixes HPCC-10394
Fixes HPCC-10395

Signed-off-by: Gordon Smith <gordon.smith@lexisnexis.com>