Add message branching

Updated the behaviour of commands:

- `lmcli edit`
  - by default create a new branch/message branch with the edited contents
  - add --in-place to avoid creating a branch
  - no longer delete messages after the edited message
  - only do the edit, don't fetch a new response
- `lmcli retry`
  - create a new branch rather than replacing old messages
  - add --offset to change where to retry from

pkg/cmd/clone.go

@@ -5,7 +5,6 @@ import (
 
 	cmdutil "git.mlow.ca/mlow/lmcli/pkg/cmd/util"
 	"git.mlow.ca/mlow/lmcli/pkg/lmcli"
-	"git.mlow.ca/mlow/lmcli/pkg/lmcli/model"
 	"github.com/spf13/cobra"
 )
 
@@ -28,36 +27,12 @@ func CloneCmd(ctx *lmcli.Context) *cobra.Command {
 				return err
 			}
 
-			messagesToCopy, err := ctx.Store.Messages(toClone)
+			clone, messageCnt, err := ctx.Store.CloneConversation(*toClone)
 			if err != nil {
-				return fmt.Errorf("Could not retrieve messages for conversation: %s", toClone.ShortName.String)
+				return fmt.Errorf("Failed to clone conversation: %v", err)
 			}
 
-			clone := &model.Conversation{
-				Title: toClone.Title + " - Clone",
-			}
-			if err := ctx.Store.SaveConversation(clone); err != nil {
-				return fmt.Errorf("Cloud not create clone: %s", err)
-			}
-
-			var errors []error
-			messageCnt := 0
-			for _, message := range messagesToCopy {
-				newMessage := message
-				newMessage.ConversationID = clone.ID
-				newMessage.ID = 0
-				if err := ctx.Store.SaveMessage(&newMessage); err != nil {
-					errors = append(errors, err)
-				} else {
-					messageCnt++
-				}
-			}
-
-			if len(errors) > 0 {
-				return fmt.Errorf("Messages failed to be cloned: %v", errors)
-			}
-
-			fmt.Printf("Cloned %d messages to: %s\n", messageCnt, clone.Title)
+			fmt.Printf("Cloned %d messages to: %s - %s\n", messageCnt, clone.ShortName.String, clone.Title)
 			return nil
 		},
 		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {