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/terminal/pull_form.go

@@ -101,7 +101,7 @@ func (p *FormPrompter) CreatePull(ctx context.Context, choices PullFormChoices)
 		}
 		switch next {
 		case pullMetadata:
-			groups := fields.groups(noBody, true, choices.Assignees, choices.Milestones, choices.Labels)[1:]
+			groups := fields.metadata(true, choices.Assignees, choices.Milestones, choices.Labels)
 			if err := p.runForm(ctx, huh.NewForm(groups...)); err != nil {
 				return values, err
 			}
@@ -124,9 +124,6 @@ func (p *FormPrompter) CreatePull(ctx context.Context, choices PullFormChoices)
 	return values, nil
 }
 
-// noBody keeps the body out of issueFields.groups, which the pull request form asks separately.
-func noBody(context.Context, string) (Draft, error) { return Draft{}, nil }
-
 // pullBranchFields are the branches of a new pull request.
 type pullBranchFields struct {
 	base, headOwner, headBranch, topic string