Added replay command which replays most recent reply (#21)

Examples:
`clai re`
`clai -r replay`

If you quickly want to check the most recent message or replay some reply without 
formatting, this is the command for you

internal/reply/replay.go

@@ -0,0 +1,22 @@
+package reply
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/baalimago/clai/internal/utils"
+)
+
+func Replay(raw bool) error {
+	prevReply, err := Load("")
+	if err != nil {
+		return fmt.Errorf("failed to load previous reply: %v", err)
+	}
+	amMessages := len(prevReply.Messages)
+	if amMessages == 0 {
+		return errors.New("failed to find any recent reply")
+	}
+	mostRecentMsg := prevReply.Messages[amMessages-1]
+	utils.AttemptPrettyPrint(mostRecentMsg, "system", raw)
+	return nil
+}

internal/reply/reply.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
+	"os"
 	"path"
 	"time"
 
@@ -41,7 +42,17 @@ func SaveAsPreviousQuery(claiConfDir string, msgs []models.Message) error {
 }
 
 // Load the prevQuery.json from the claiConfDir/conversations directory
+// If claiConfDir is left empty, it will be re-constructed. The technical debt
+// is piling up quite fast here
 func Load(claiConfDir string) (models.Chat, error) {
+	if claiConfDir == "" {
+		confDir, err := os.UserConfigDir()
+		if err != nil {
+			return models.Chat{}, fmt.Errorf("failed to find home dir: %v", err)
+		}
+		claiConfDir = path.Join(confDir, ".clai")
+	}
+
 	c, err := chat.FromPath(path.Join(claiConfDir, "conversations", "prevQuery.json"))
 	if err != nil {
 		if errors.Is(err, fs.ErrNotExist) {

internal/setup.go

@@ -11,6 +11,7 @@ import (
 	"github.com/baalimago/clai/internal/glob"
 	"github.com/baalimago/clai/internal/models"
 	"github.com/baalimago/clai/internal/photo"
+	"github.com/baalimago/clai/internal/reply"
 	"github.com/baalimago/clai/internal/setup"
 	"github.com/baalimago/clai/internal/text"
 	"github.com/baalimago/clai/internal/utils"
@@ -36,6 +37,7 @@ const (
 	VERSION
 	SETUP
 	CMD
+	REPLAY
 )
 
 var defaultFlags = Configurations{
@@ -81,6 +83,8 @@ func getModeFromArgs(cmd string) (Mode, error) {
 		return VERSION, nil
 	case "cmd":
 		return CMD, nil
+	case "replay", "re":
+		return REPLAY, nil
 	default:
 		return HELP, fmt.Errorf("unknown command: '%s'", os.Args[1])
 	}
@@ -235,6 +239,12 @@ func Setup(usage string) (models.Querier, error) {
 		}
 		os.Exit(0)
 		return nil, nil
+	case REPLAY:
+		err := reply.Replay(flagSet.PrintRaw)
+		if err != nil {
+			return nil, fmt.Errorf("failed to replay previous reply: %v", err)
+		}
+		os.Exit(0)
 	default:
 		return nil, fmt.Errorf("unknown mode: %v", mode)
 	}

main.go

@@ -42,6 +42,7 @@ Commands:
   p|photo <text>                Ask the photo model a picture with the requested prompt
   g|glob  <glob> <text>         Query the chat model with the contents of the files found by the glob and the given text
   cmd <text>                    Describe the command you wish to do, then execute the suggested command. It's a bit wonky when used with -re.
+  re|replay                     Replay the most recent message.
 
   c|chat   n|new       <prompt>   Create a new chat with the given prompt.
   c|chat   c|continue  <chatID>   Continue an existing chat with the given chat ID.