feat(markdown): Host github-markdown.css on gitpoint.co

[machour]

This will be used for iOS Markdown webview instead of https://machour.idk.tn/github-markdown.css until we come up with a better solution

[andrewda]

Wait – why can't this be bundled with the app? It's not super great to be downloading a 700 line CSS file over data all the time.

[machour]

@andrewda I was able to call the bundled CSS in the WebView in Android using file:https:///android_assets/css/github-markdown.css, but I couldn't figure out how to do it for iOS.
I'd be really glad if you can have a look, here's the relevant line: https://github.com/gitpoint/git-point/blob/master/src/components/markdown-webview.component.js#L36

Another solution would be to simply inject the file content in a <style> tag in the generated HTML..

[andrewda]

@machour I'll look into it. I've definitely done something similar in the past, but forget exactly how.

[machour]

Handled differently as per Andrew's advice