Refine Data Summary renderer card and tooltips

[RandomFractals]

see #14 and https://github.com/RandomFractals/vscode-data-table#data-summary--renderer-view

[RandomFractals]

patched up table column values percent in light theme display :)

[RandomFractals]

updated data summary card display:

[RandomFractals]

see updated data summary view in docs: https://github.com/RandomFractals/vscode-data-table#data-summary--renderer-view