Switch from webpack to esbuild for bundling webviews

[datho7561]

This PR uses esbuild instead of webpack to bundle the webviews. This dramatically reduces the time it takes to bundle the webviews, from >50 seconds to <1 second.

This PR also modifies the npm scripts and VS Code launch configurations to always recompile the webviews before launching.

I also set up eslint to be run before launching the extension. If the extension seems slower to launch in debug mode, this is why.

Closes #2875

Signed-off-by: David Thompson davthomp@redhat.com

[codecov]

Codecov Report

Patch coverage: 79.31% and project coverage change: +0.31 🎉

Comparison is base (00f8659) 36.78% compared to head (6f2b9fb) 37.10%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2914      +/-   ##
==========================================
+ Coverage   36.78%   37.10%   +0.31%     
==========================================
  Files          53       54       +1     
  Lines        3681     3652      -29     
  Branches      715      716       +1     
==========================================
+ Hits         1354     1355       +1     
+ Misses       2327     2297      -30     

Impacted Files	Coverage Δ
.../webview/create-service/createServiceViewLoader.ts	31.25% <50.00%> (+9.51%)	⬆️
src/webview/git-import/gitImportLoader.ts	16.66% <50.00%> (+0.81%)	⬆️
src/webview/devfile-registry/registryViewLoader.ts	31.32% <75.00%> (+0.21%)	⬆️
src/webview/common-ext/utils.ts	77.77% <77.77%> (ø)
src/webview/log/LogViewLoader.ts	26.92% <80.00%> (+5.71%)	⬆️
src/webview/helm-chart/helmChartLoader.ts	28.37% <87.50%> (+2.45%)	⬆️
src/webview/cluster/clusterViewLoader.ts	9.58% <88.88%> (+0.64%)	⬆️
src/webview/welcome/welcomeViewLoader.ts	66.66% <100.00%> (-3.83%)	⬇️

... and 1 file with indirect coverage changes

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[datho7561]

I realized that type checking is not being performed on the webview files. I'm going to make a quick change to fix that.

[datho7561]

Just ran into this: microsoft/vscode#70283. Prelaunch tasks that use dependsOn with a background task cannot prevent debug from launching. This is a bit of a set back. I think my work around for this will be not running eslint as a part of the prelaunch tasks, and running the rest of the tasks synchronously every time launch is triggered.

[rgrunber]

Tried it out and seems to be working well for me!

[msivasubramaniaan]

LGTM