feat: add auto tag and list commits functionality

Author: nguyenvanduocit

..HEAD

@@ -64,15 +64,19 @@ When use `-a` flag, ai-commit will auto stage all changes then commit with gener
 ai-commit -a
 ```
 
-## Tip
+### Auto tag
 
-It's recommended to make multiple small commits, commit more often.
+When use `-t` flag, ai-commit will ba
+
+```bash
+ai-commit -t
+```
 
 ## Todo
 
 - [ ] Auto split changes in to multiple commits.
 - [x] Detect commit type.
-- [ ] Auto tags?
+- [x] Auto tags?
 
 ## License
 

README.md

@@ -147,7 +147,10 @@ func main() {
 			currentTag = "v0.0.0"
 		}
 
-		nextTag, err := getNextTag(client, commitMessage, currentTag)
+		commits, err := listCommits(currentTag)
+		errGuard(client, err)
+
+		nextTag, err := getNextTag(client, commits, currentTag)
 		errGuard(client, err)
 
 		if err := tag(nextTag); err != nil {
@@ -222,6 +225,23 @@ func gitAdd() error {
 	)
 }
 
+// git log v1.1.3..HEAD --oneline
+func listCommits(lastTag string) (string, error) {
+	workingDir, err := os.Getwd()
+	if err != nil {
+		return "", err
+	}
+
+	cmd := exec.Command("git", "log", lastTag+"..HEAD", "--oneline")
+	cmd.Dir = workingDir
+	out, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(string(out)), nil
+}
+
 func askForAutoStage(apiClient *GptClient) (bool, error) {
 	question := "Your working tree is dirty, do you want me to stage the changes first?"
 	userResponse, err := readUserInput(question)