feat: UI redesign - vscode alignment

[lcottercertinia]

Is your feature request related to a problem?

We should align the style of our UI to vscode

Describe the solution you'd like

Tasks

Beta Give feedback

1. New header bar #249
   1.10 enhancement +2
   
2. Skelton loading UI #252
   1.10 enhancement +2
3. Add icons to commands #250
   1.10 enhancement +2
4. Restyle links #248
   1.10 enhancement +2
   
5. feat: Can we use use vscode-webview-ui-toolkit to improve design consistency #58
   1.10 enhancement good first issue +3
   
6. feat: rework the log title hyperlink #234
   1.10 enhancement +2
   
7. feat: Better notifications / issue messages #393
   1.10 enhancement +2

Other things

Hover on log title, show:

• Log size

• log length

• Total soql, dml, CPU , heap

• key limits summaries

• Tab icons

• log size + length colors: Red if too big e.g > 50mb or longer than 10/60s depending on async