feat(issue): gh-style issue list, view, create, edit, close and reopen

issue list renders through the shared table: a context line, ID TITLE
LABELS [STATE] [KIND] AUTHOR UPDATED with relative times on a terminal,
the ID colored by state and linked, and a stable tab-separated column
set when piped; empty results say so on stderr. It gains -s -L -l -a -A
-m -S -w, @me, comma-separated label and milestone filters, and --web.

issue view, edit, close and reopen accept #N, OWNER/REPO#N and issue
URLs. Mutations report "✓ Created/Edited/Closed issue alice/x#5 (title)"
on a terminal; issue create prints the new issue's URL on stdout (also
as issue new), and close and reopen skip issues already in that state
with a ! line and take -c/--comment. issue create and edit gain the gh
short flags and singular --add-label, --remove-label, --add-assignee and
--remove-assignee (the plural names still work), and create gains --web.

The interactive create form asks for the title and body, then "What's
next?" (submit, add metadata or cancel), without a confirmation after
it; the edit form names the issue it edits. Every issue command has help
text with examples and completes its flags and issue numbers.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/issue_bulk_edit_test.go

@@ -64,3 +64,53 @@ func TestIssueEditMergesAssigneesWithOneRead(t *testing.T) {
 	require.Equal(t, 1, reads)
 	require.Equal(t, []any{"alice", "carol"}, patched)
 }
+
+func TestIssueMutationsReportDoneLines(t *testing.T) {
+	var changed []string
+	server := newAuthenticatedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.Method + " " + r.URL.Path {
+		case "GET /api/v1/repos/alice/project/issues/5":
+			_, _ = w.Write([]byte(`{"number":5,"title":"Open one","state":"open"}`))
+		case "GET /api/v1/repos/alice/project/issues/6":
+			_, _ = w.Write([]byte(`{"number":6,"title":"Closed one","state":"closed"}`))
+		case "GET /api/v1/repos/alice/project/issues/14":
+			_, _ = w.Write([]byte(`{"number":14,"title":"Merged one","state":"closed","pull_request":{"merged":true}}`))
+		case "POST /api/v1/repos/alice/project/issues":
+			changed = append(changed, r.Method+" "+r.URL.Path)
+			_, _ = w.Write([]byte(`{"number":9,"title":"New","state":"open","html_url":"https://example.org/alice/project/issues/9"}`))
+		case "POST /api/v1/repos/alice/project/issues/5/comments":
+			changed = append(changed, r.Method+" "+r.URL.Path+" "+payloadField(t, r, "body"))
+			_, _ = w.Write([]byte(`{"id":1}`))
+		default:
+			changed = append(changed, r.Method+" "+r.URL.Path)
+			_, _ = w.Write([]byte(`{"number":5,"title":"Open one","state":"closed"}`))
+		}
+	}))
+	defer server.Close()
+	deps, out, diagnostics := serverDeps(t, server.URL)
+	deps.Getenv = serverEnv(server.URL, map[string]string{"NO_COLOR": "1"})
+	run := func(tty bool, args ...string) {
+		t.Helper()
+		out.Reset()
+		diagnostics.Reset()
+		deps.Streams.OutTTY = tty
+		require.NoError(t, Execute(context.Background(), deps, append(args, "-R", "alice/project", "--no-input")))
+	}
+	run(true, "issue", "close", "5", "#6", "14", "-c", "Fixed in #7")
+	require.Empty(t, out.String())
+	require.Equal(t, "✓ Closed issue alice/project#5 (Open one)\n"+
+		"! Issue alice/project#6 (Closed one) is already closed\n"+
+		"! Pull request alice/project#14 (Merged one) is already merged\n", diagnostics.String())
+	require.Equal(t, []string{"POST /api/v1/repos/alice/project/issues/5/comments Fixed in #7", "PATCH /api/v1/repos/alice/project/issues/5"}, changed)
+	run(false, "issue", "reopen", "6")
+	require.Empty(t, out.String())
+	require.Empty(t, diagnostics.String())
+	run(true, "issue", "create", "--title", "New")
+	require.Equal(t, "https://example.org/alice/project/issues/9\n", out.String())
+	require.Equal(t, "✓ Created issue alice/project#9 (New)\n", diagnostics.String())
+	run(false, "issue", "new", "--title", "New")
+	require.Equal(t, "https://example.org/alice/project/issues/9\n", out.String())
+	require.Empty(t, diagnostics.String())
+	run(true, "issue", "edit", "5", "--title", "Open one")
+	require.Equal(t, "✓ Edited issue alice/project#5 (Open one)\n", diagnostics.String())
+}