feat: `sector_view.svelte` tab gains dummy plots with global param inputs

[jdhoffa]

In this PR, I implement the Technology Mix and Volume Trajectory plots with dummy data into thesector_view.svelte tab. Plot parameters can be controlled via external global selection input via EventListeners, as @cjyetman prototyped in: https://github.com/RMI-PACTA/test_static_dashboard

Dummy data gained

data_techmix.json data_trajectory_alignment.json

Exported JS classes gains

techexposure trajectory_alignment

Styling gained

css/plot_styles.css

Overall layout changes

sector_view.svelte gains general structural layout + dummy plots

Dependencies gained

d3 and d3-array

[jdhoffa]

May be of interest to @MonikaFu @cjyetman and @AlexAxthelm

If you want to test this out locally (requires having Nodejs and npm installed), you can try:

npm install
npm run dev

and inspect the resulting webpage.

Should look like: