Add network status alert notification bar

This dependency has been bumped to 1.3.8 after running npm audit fix.

Whenever there is a network issue or a user is not authorized we want to
show  an alert notification.

Thus this patch adds the AlertNotification component and uses it in the
app.

build(deps-dev): bump electron from 10.1.2 to 10.2.0 in /app

Help link for authentication docs

We have seen most of the users complaining what is actually the token
they need for authentication and they have no where to look from the UI.
This patch adds a help link below token prompt so that users can be
directed toward the authentication docs.

Bumps [electron](https://github.com/electron/electron) from 10.1.2 to 10.2.0.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/master/docs/breaking-changes.md)
- [Commits](https://github.com/electron/electron/compare/v10.1.2...v10.2.0

)
Signed-off-by: dependabot[bot] <support@github.com>

Add login screen back for OIDC configurations

OIDC should show both a SIGNIN, and USE A TOKEN buttons.
After v0.1.3 this wasn't the case anymore. It would go
straight to the token entry state instead.

Support relative certificate-authority paths in config

Relative paths are not handled properly in the kubeconfig
(at least for certificate-authority).

To quote from the documentation:
> File and path references in a kubeconfig file are relative to
> the location of the kubeconfig file

https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/#file-references

Change the default windows size for desktop app

Check for nil and empty username in context parsing (#170)

Co-authored-by: René Dudfield <rene@kinvolk.io>

We somehow missed the lint fixup for app code in the typescript port
patch. This patch runs the lint:fix script over the app codebase.

By default we want to take the entire screen space.

Port app code to typescript

This patch updates the main.js code that was used for desktop app to
typescript. We also add a new script that compiles the typescript file
and stores the resultant output file in electron/src/main.js.
We also don't want to commit the generated main.js file as it will be
auto generated on project build.

Storybook, start adding stories for frontend development

app: Update how we check dev mode for desktop app

We don't ship app.asar now but we were using it to check if the app is
run in dev mode or prod. This patch updates how we check dev mode.
And also includes the proper aligning for extraResources in package.json

docs: headless mode and windows installation guide

We now have headless mode in our app where users can run the desktop app
in there default browser but no mention of it is in the docs also we
miss the windows installation docs.
This patch adds docs on how headless mode can be used and also adds win
installation docs.

Makefile: Improve the app related targets

Enable sourceMap for frontend build

Instead of repeating the "npm run build" command in all the 3 app
related targets, we now create an app-build target for that, and also
run "npm install" in it, as it's a needed first step.

Now sourcemaps work in the developer console.
Co-authored-by: Ashu Ghildiyal <ashu@kinvolk.io>

https://storybook.js.org/

A basic configuration which provides a Material UI ThemeProvider.
Not so many addons yet.