Add some readme badges

README.md

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+<a href="https://pkg.go.dev/fyne.io/fyne/v2?tab=doc" title="Go API Reference" rel="nofollow"><img src="https://img.shields.io/badge/go-documentation-blue.svg?style=flat" alt="Go API Reference"></a>
+[![Analysis](https://github.com/rymdport/portal/actions/workflows/analysis.yml/badge.svg)](https://github.com/rymdport/portal/actions/workflows/analysis.yml)
+[![Go Report Card](https://goreportcard.com/badge/github.com/rymdport/portal)](https://goreportcard.com/report/github.com/rymdport/portal)
+
 # Portal
 
 Portal is a Go wrapper around the [XDG Desktop Protocol](https://flatpak.github.io/xdg-desktop-portal/) over DBUS.