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/color.go

@@ -0,0 +1,77 @@
+package iostreams
+
+import "fmt"
+
+// ColorScheme provides semantic color methods that respect whether color output is enabled.
+type ColorScheme struct {
+	enabled bool
+}
+
+// NewColorScheme creates a ColorScheme. When enabled is false, all methods return
+// undecorated text.
+func NewColorScheme(enabled bool) *ColorScheme {
+	return &ColorScheme{enabled: enabled}
+}
+
+// colorize wraps text in ANSI escape codes if color is enabled.
+func (cs *ColorScheme) colorize(code string, text string) string {
+	if !cs.enabled {
+		return text
+	}
+	return fmt.Sprintf("\033[%sm%s\033[0m", code, text)
+}
+
+// Bold renders text in bold.
+func (cs *ColorScheme) Bold(s string) string {
+	return cs.colorize("1", s)
+}
+
+// Red renders text in red.
+func (cs *ColorScheme) Red(s string) string {
+	return cs.colorize("31", s)
+}
+
+// Green renders text in green.
+func (cs *ColorScheme) Green(s string) string {
+	return cs.colorize("32", s)
+}
+
+// Yellow renders text in yellow.
+func (cs *ColorScheme) Yellow(s string) string {
+	return cs.colorize("33", s)
+}
+
+// Cyan renders text in cyan.
+func (cs *ColorScheme) Cyan(s string) string {
+	return cs.colorize("36", s)
+}
+
+// Magenta renders text in magenta.
+func (cs *ColorScheme) Magenta(s string) string {
+	return cs.colorize("35", s)
+}
+
+// Muted renders text in gray (dimmed).
+func (cs *ColorScheme) Muted(s string) string {
+	return cs.colorize("90", s)
+}
+
+// SuccessIcon returns a green check mark if color is enabled, plain otherwise.
+func (cs *ColorScheme) SuccessIcon() string {
+	return cs.Green("✓")
+}
+
+// WarningIcon returns a yellow exclamation mark if color is enabled, plain otherwise.
+func (cs *ColorScheme) WarningIcon() string {
+	return cs.Yellow("!")
+}
+
+// FailureIcon returns a red X mark if color is enabled, plain otherwise.
+func (cs *ColorScheme) FailureIcon() string {
+	return cs.Red("✗")
+}
+
+// SuccessIconWithColor returns the success icon followed by the message in green.
+func (cs *ColorScheme) SuccessIconWithColor(msg string) string {
+	return cs.SuccessIcon() + " " + cs.Green(msg)
+}