Reorganize the project layout, fix some logging quirks

Signed-off-by: Shin'ya Minazuki <shinyoukai@laidback.moe>

follow.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"git.laidback.moe/shinyoukai/mikuru/mirai"
+	"go.yarn.social/client"
+)
+
+var followCmd = &cobra.Command{
+	Use: "follow <NICK> <URL>",
+	Short: "Track a twtxt.txt feed, located in a Yarn pod or otherwise",
+	Run: func(_ *cobra.Command, args []string) {
+		cli, err := client.NewClient(
+			client.WithURI(mirai.Config.Host),
+			client.WithToken(mirai.Config.Token),
+		)
+		if err != nil {
+			log.Fatal(err)
+		}
+		if len(args) != 2 {
+			log.Fatal("Not enough arguments")
+		}
+		nick := args[0]
+		url := args[1]
+
+		observe(cli, nick, url)
+		if err != nil {
+			log.Fatalf("Could not follow %s at %s\n", nick, url)
+		}
+	},
+}
+
+func init() {
+	mirai.ConfInit()
+	rootCmd.AddCommand(followCmd)
+}
+
+func observe(cli *client.Client, nick, url string) error {
+	err := cli.Follow(nick, url)
+	if err != nil {
+		return err
+	}
+	return nil
+}