Add progressive web app configuration

[hvangeffen]

Description

Defaults to standard web oc deltares icon and description.
When run outside of the CI in build mode will also download logo and description / title from the web oc config endpoint of the fews webservices set in the env variables.
Maybe for deploy we want to have a specific flag (env variable) to do set this, so that lemon / gray coast and such have PWA.

Example generated manifest

{
  "name": "ETheKwini Early Warning System",
  "short_name": "WebOC",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#ffffff",
  "lang": "en",
  "scope": "/",
  "description": "ETheKwini Early Warning System",
  "theme_color": "#080c80",
  "icons": [
    { "src": "pwa-64x64.png", "sizes": "64x64", "type": "image/png" },
    { "src": "pwa-192x192.png", "sizes": "192x192", "type": "image/png" },
    { "src": "pwa-512x512.png", "sizes": "512x512", "type": "image/png" },
    {
      "src": "maskable-icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "maskable"
    }
  ]
}

This can be updated by the person deploying the application. As well as updating the images in the dist root:

Screenshots

Default config

Config gotten remotely

Link to documentation (if applicable)

Add link to public Github pages (only documentation about configuration)

Checklist

• Make the title short and concise
• Select the correct label to include it in the release notes:
  • rel: new feature
  • rel: improvement
  • rel: fixes
  • rel: ignore
    Select to rel: ignore if this pull request fixes a New Feature or Improvement in the coming release. Update related Pull Request.
• Update documentation.
• Update tests.