feat: add man page

go.mod

@@ -6,6 +6,8 @@ require (
 	github.com/charmbracelet/bubbles v0.16.2-0.20230711184233-0bdcc628fb8f
 	github.com/charmbracelet/bubbletea v0.24.3-0.20230710130425-c4c83ba757f8
 	github.com/charmbracelet/lipgloss v0.7.1
+	github.com/muesli/mango-cobra v1.2.0
+	github.com/muesli/roff v0.1.0
 	github.com/resendlabs/resend-go v1.7.0
 	github.com/spf13/cobra v1.7.0
 	github.com/yuin/goldmark v1.5.4
@@ -24,6 +26,8 @@ require (
 	github.com/mattn/go-runewidth v0.0.14 // indirect
 	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/mango v0.1.0 // indirect
+	github.com/muesli/mango-pflag v0.1.0 // indirect
 	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/muesli/termenv v0.15.2 // indirect
 	github.com/rivo/uniseg v0.4.4 // indirect

go.sum

@@ -38,8 +38,16 @@ github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D
 github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
 github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
 github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
+github.com/muesli/mango v0.1.0 h1:DZQK45d2gGbql1arsYA4vfg4d7I9Hfx5rX/GCmzsAvI=
+github.com/muesli/mango v0.1.0/go.mod h1:5XFpbC8jY5UUv89YQciiXNlbi+iJgt29VDC5xbzrLL4=
+github.com/muesli/mango-cobra v1.2.0 h1:DQvjzAM0PMZr85Iv9LIMaYISpTOliMEg+uMFtNbYvWg=
+github.com/muesli/mango-cobra v1.2.0/go.mod h1:vMJL54QytZAJhCT13LPVDfkvCUJ5/4jNUKF/8NC2UjA=
+github.com/muesli/mango-pflag v0.1.0 h1:UADqbYgpUyRoBja3g6LUL+3LErjpsOwaC9ywvBWe7Sg=
+github.com/muesli/mango-pflag v0.1.0/go.mod h1:YEQomTxaCUp8PrbhFh10UfbhbQrM/xJ4i2PB8VTLLW0=
 github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s=
 github.com/muesli/reflow v0.3.0/go.mod h1:pbwTDkVPibjO2kyvBQRBxTWEEGDGq0FlB1BIKtnHY/8=
+github.com/muesli/roff v0.1.0 h1:YD0lalCotmYuF5HhZliKWlIx7IEhiXeSfq7hNjFqGF8=
+github.com/muesli/roff v0.1.0/go.mod h1:pjAHQM9hdUUwm/krAfrLGgJkXJ+YuhtsfZ42kieB2Ig=
 github.com/muesli/termenv v0.15.1 h1:UzuTb/+hhlBugQz28rpzey4ZuKcZ03MeKsoG7IJZIxs=
 github.com/muesli/termenv v0.15.1/go.mod h1:HeAQPTzpfs016yGtA4g00CsdYnVLJvxsS4ANqrZs2sQ=
 github.com/muesli/termenv v0.15.2 h1:GohcuySI0QmI3wN8Ok9PtKGkgkFIk7y6Vpb5PvrY+Wo=

main.go

@@ -8,6 +8,8 @@ import (
 	"strings"
 
 	tea "github.com/charmbracelet/bubbletea"
+	mcobra "github.com/muesli/mango-cobra"
+	"github.com/muesli/roff"
 	"github.com/resendlabs/resend-go"
 	"github.com/spf13/cobra"
 )
@@ -119,8 +121,26 @@ var CompletionCmd = &cobra.Command{
 	},
 }
 
+var ManCmd = &cobra.Command{
+	Use:    "man",
+	Short:  "Generate man page",
+	Long:   `To generate the man page`,
+	Args:   cobra.NoArgs,
+	Hidden: true,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		page, err := mcobra.NewManPage(1, rootCmd) // .
+		if err != nil {
+			return err
+		}
+
+		page = page.WithSection("Copyright", "© 2023 Charmbracelet, Inc.\n"+"Released under MIT License.")
+		fmt.Println(page.Build(roff.NewDocument()))
+		return nil
+	},
+}
+
 func init() {
-	rootCmd.AddCommand(CompletionCmd)
+	rootCmd.AddCommand(CompletionCmd, ManCmd)
 
 	rootCmd.Flags().StringSliceVar(&to, "bcc", []string{}, "BCC recipients")
 	rootCmd.Flags().StringSliceVar(&to, "cc", []string{}, "CC recipients")