feat: begin github support

github/github.go

@@ -0,0 +1,70 @@
+package github
+
+import (
+	"github.com/packwiz/packwiz/cmd"
+	"github.com/packwiz/packwiz/core"
+	"github.com/spf13/cobra"
+)
+
+var githubCmd = &cobra.Command{
+	Use:     "github",
+	Aliases: []string{"gh"},
+	Short:   "Manage github-based mods",
+}
+
+func init() {
+	cmd.Add(githubCmd)
+	core.Updaters["github"] = ghUpdater{}
+}
+
+type ModReleases struct {
+	URL       string `json:"url"`
+	AssetsURL string `json:"assets_url"`
+	UploadURL string `json:"upload_url"`
+	HTMLURL   string `json:"html_url"`
+	ID        int    `json:"id"`
+	Author    struct {
+		Login             string `json:"login"`
+		ID                int    `json:"id"`
+		NodeID            string `json:"node_id"`
+		AvatarURL         string `json:"avatar_url"`
+		GravatarID        string `json:"gravatar_id"`
+		URL               string `json:"url"`
+		HTMLURL           string `json:"html_url"`
+		FollowersURL      string `json:"followers_url"`
+		FollowingURL      string `json:"following_url"`
+		GistsURL          string `json:"gists_url"`
+		StarredURL        string `json:"starred_url"`
+		SubscriptionsURL  string `json:"subscriptions_url"`
+		OrganizationsURL  string `json:"organizations_url"`
+		ReposURL          string `json:"repos_url"`
+		EventsURL         string `json:"events_url"`
+		ReceivedEventsURL string `json:"received_events_url"`
+		Type              string `json:"type"`
+		SiteAdmin         bool   `json:"site_admin"`
+	} `json:"author"`
+	NodeID          string  `json:"node_id"`
+	TagName         string  `json:"tag_name"`
+	TargetCommitish string  `json:"target_commitish"`
+	Name            string  `json:"name"`
+	Draft           bool    `json:"draft"`
+	Prerelease      bool    `json:"prerelease"`
+	CreatedAt       string  `json:"created_at"`
+	PublishedAt     string  `json:"published_at"`
+	Assets          []Asset `json:"assets"`
+	TarballURL      string  `json:"tarball_url"`
+	ZipballURL      string  `json:"zipball_url"`
+	Body            string  `json:"body"`
+	Reactions       struct {
+		URL        string `json:"url"`
+		TotalCount int    `json:"total_count"`
+		Num1       int    `json:"+1"`
+		Num10      int    `json:"-1"`
+		Laugh      int    `json:"laugh"`
+		Hooray     int    `json:"hooray"`
+		Confused   int    `json:"confused"`
+		Heart      int    `json:"heart"`
+		Rocket     int    `json:"rocket"`
+		Eyes       int    `json:"eyes"`
+	} `json:"reactions"`
+}