Pack unnecessary files

[sanemat]

$ docker run -it -v $(pwd):/workspace vsce ls
Executing prepublish script 'npm run vscode:prepublish'...

> [email protected] vscode:prepublish /workspace
> npm run package


> [email protected] package /workspace
> webpack --mode production --devtool hidden-source-map

    [webpack-cli] Compiler starting... 
    [webpack-cli] Compiler is using config: '/workspace/webpack.config.js'
    [webpack-cli] Compiler finished
asset extension.js 607 bytes [compared for emit] [minimized] (name: main) 1 related asset
./src/extension.ts 1.4 KiB [built] [code generated]
external "vscode" 42 bytes [built] [code generated]
webpack 5.65.0 compiled successfully in 1337 ms
.github/dependabot.yml
.github/workflows/test.yml
.idea/.gitignore
.idea/codeStyles/codeStyleConfig.xml
.idea/codeStyles/Project.xml
.idea/inspectionProfiles/Project_Default.xml
.idea/misc.xml
.idea/modules.xml
.idea/vcs.xml
.idea/vscode-named-save.iml
.idea/workspace.xml
.prettierignore
CHANGELOG.md
dist/extension.js
package.json
README.md
 INFO  
The latest version of vsce is 2.6.1 and you have 0.0.0.
Update it now: npm install -g vsce