[internal] - refactor: improve override config search and update titles

 - Search for override config in parent directories until the root directory
 - Use model ID as the title for embed, diff, and chat commands
 - Change default role name in chat command to "anon"

chat/chat.go

@@ -64,7 +64,7 @@ func NewCmd(openAIClient *openai.Client, config *configuration.Config) *cobra.Co
 			cobra.CheckErr(err)
 
 			// Headers.
-			roleName := "default"
+			roleName := "anon"
 			if role != nil {
 				roleName = role.Name
 			}

diff/diff.go

@@ -41,7 +41,7 @@ func NewCmd(openAIClient *openai.Client, config *configuration.Config) *cobra.Co
 			cobra.CheckErr(err)
 
 			// Headers.
-			cli.Title("SGPT DIFF [%s]", model.ID)
+			cli.Title(model.ID)
 
 			// Run git diff.
 			path, err := exec.LookPath("git")

embed/embed.go

@@ -55,7 +55,7 @@ func NewCmd(openAIClient *openai.Client, config *configuration.Config) *cobra.Co
 			cobra.CheckErr(err)
 
 			// Headers.
-			cli.Title("SGPT EMBED [%s]", model.ID)
+			cli.Title(model.ID)
 
 			// Run git diff.
 			path, err := exec.LookPath("git")

internal/configuration/configuration.go

@@ -98,12 +98,11 @@ func Parse(path string) (*Config, error) {
 	}
 
 	// Parse override configuration if present.
-	overrideConfigPath := ".sgpt.json"
-	ok, err := file.Exists(overrideConfigPath)
+	overrideConfigPath, err := findOverrideConfigPath()
 	if err != nil {
-		return nil, errors.Wrap(err, "checking override config existence")
+		return nil, errors.Wrap(err, "finding override config path")
 	}
-	if ok {
+	if overrideConfigPath != "" {
 		bytes, err := os.ReadFile(overrideConfigPath)
 		if err != nil {
 			return nil, errors.Wrap(err, "reading override config")
@@ -161,3 +160,30 @@ func initializeIfNotPresent(path string) error {
 	}
 	return nil
 }
+
+func findOverrideConfigPath() (string, error) {
+	currentDir, err := os.Getwd()
+	if err != nil {
+		return "", errors.Wrap(err, "getting working directory")
+	}
+
+	for {
+		overrideConfigPath := filepath.Join(currentDir, ".sgpt.json")
+		ok, err := file.Exists(overrideConfigPath)
+		if err != nil {
+			return "", errors.Wrap(err, "checking override config existence")
+		}
+
+		if ok {
+			return overrideConfigPath, nil
+		}
+
+		if currentDir == filepath.Dir(currentDir) { // Reached root
+			break
+		}
+
+		currentDir = filepath.Dir(currentDir)
+	}
+
+	return "", nil
+}