feat: v0.3.0d — add PR checks, iostreams, aliases, and broad enhancements

Add PR checks command, iostreams/text packages for colored table output,
top-level run/workflow aliases matching gh CLI structure. Enhance actions,
issues, PRs, releases, repos, labels, milestones, and wiki commands with
improved flags, JSON output, and error handling.

internal/iostreams/table.go

@@ -0,0 +1,64 @@
+package iostreams
+
+import (
+	"fmt"
+	"strings"
+	"text/tabwriter"
+)
+
+// TablePrinter prints TTY-aware tables. In TTY mode it uses aligned columns with
+// bold headers. In pipe mode it emits tab-separated values without headers.
+type TablePrinter struct {
+	ios     *IOStreams
+	headers []string
+	rows    [][]string
+}
+
+// NewTablePrinter creates a TablePrinter that writes to ios.Out.
+func NewTablePrinter(ios *IOStreams) *TablePrinter {
+	return &TablePrinter{
+		ios: ios,
+	}
+}
+
+// AddHeader sets the column headers. Headers are only displayed in TTY mode.
+func (t *TablePrinter) AddHeader(headers ...string) {
+	t.headers = headers
+}
+
+// AddRow appends a row of fields to the table.
+func (t *TablePrinter) AddRow(fields ...string) {
+	t.rows = append(t.rows, fields)
+}
+
+// Render writes the table to the IOStreams output. In TTY mode it uses tabwriter
+// with bold headers. In pipe mode it emits tab-separated values without headers.
+func (t *TablePrinter) Render() error {
+	if !t.ios.IsStdoutTTY() {
+		// Pipe mode: tab-separated, no headers
+		for _, row := range t.rows {
+			if _, err := fmt.Fprintln(t.ios.Out, strings.Join(row, "\t")); err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	// TTY mode: use tabwriter with aligned columns
+	w := tabwriter.NewWriter(t.ios.Out, 0, 0, 2, ' ', 0)
+
+	if len(t.headers) > 0 {
+		cs := t.ios.ColorScheme()
+		boldHeaders := make([]string, len(t.headers))
+		for i, h := range t.headers {
+			boldHeaders[i] = cs.Bold(h)
+		}
+		fmt.Fprintln(w, strings.Join(boldHeaders, "\t"))
+	}
+
+	for _, row := range t.rows {
+		fmt.Fprintln(w, strings.Join(row, "\t"))
+	}
+
+	return w.Flush()
+}