Implement notification subcommands (#389)

- [x] enhance notification listing
  - add `--states` and `--type` filters
  - toggle per-user or per-repo listing via `--mine` flag
  - print more fields
- [x] add subcommands to mark notifications as read, unread, pinned, unpinned. operates on
  - all notifications matching the `--state` and `--mine` filter flags, or
  - a notification specified by ID.
- [ ] ~~add a `--fields` flag for notifications listing.~~ *not in this PR*
- [ ] ~~interactive mode~~ *not in this PR*. this would go well together with #324

fixes #243, fixes #155

based on initial work in #283 and #386, but opening a new PR for @6543 to review as I changed quite a lot

---

### ⚠️ breaking ⚠️
- `tea notifications --all` has moved to `tea notifications --mine`
- `tea notifications` now only works with the context of a remote repo.
  To run this outside of a local git dir, run either `tea n --mine` or `tea n --repo <my/repo>`

---

Co-authored-by: Karl Heinz Marbaise <kama@soebes.de>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Norwin Roosen <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/389
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: Alexey 〒erentyev <axifive@noreply.gitea.io>
Co-authored-by: Norwin <noerw@noreply.gitea.io>
Co-committed-by: Norwin <noerw@noreply.gitea.io>

modules/print/notification.go

@@ -5,6 +5,7 @@
 package print
 
 import (
+	"fmt"
 	"strings"
 
 	"code.gitea.io/sdk/gitea"
@@ -13,6 +14,8 @@ import (
 // NotificationsList prints a listing of notification threads
 func NotificationsList(news []*gitea.NotificationThread, output string, showRepository bool) {
 	headers := []string{
+		"ID",
+		"Status",
 		"Type",
 		"State",
 		"Index",
@@ -39,7 +42,21 @@ func NotificationsList(news []*gitea.NotificationThread, output string, showRepo
 			index = "#" + index
 		}
 
-		item := []string{string(n.Subject.Type), string(n.Subject.State), index, n.Subject.Title}
+		status := "read"
+		if n.Pinned {
+			status = "pinned"
+		} else if n.Unread {
+			status = "unread"
+		}
+
+		item := []string{
+			fmt.Sprint(n.ID),
+			status,
+			string(n.Subject.Type),
+			string(n.Subject.State),
+			index,
+			n.Subject.Title,
+		}
 		if showRepository {
 			item = append(item, n.Repository.FullName)
 		}