Update use of charting library and refine examples

[sgreenbury]

Following from #6, this issue aims to address the following:

• Currently the charting is done with chart.js but it would be better to svelte-chartjs with a fix for support for svelte5. See Add charts.js package and example components #23 (comment) for more details.
• Currently the example charts are in the template app rather the UA components. Consider moving these examples to the ua_components package here allowing data to be passed in or new examples with svelte-chartjs
• Refine the zoom/interactive functionality on chart examples/components. Currently using chartjs-zoom-plugin to draw rectangle to zoom.