style(ui): redesign new menu (#18)

- 2 mode classic (the old one) and modern
a2a17cab3a4bdf27abd2a956f9d53a0c4a685909
- add icon 3a11c7a6beb1dcf11e89977f380376fdea9fba89
- fix some bugs

config/config.go

@@ -39,9 +39,11 @@ type CoreConfig struct {
 }
 
 type UIConfig struct {
-	GhostText      bool `toml:"ghost-text"`
-	MaxSuggestions int  `toml:"max-suggestions"`
-	MaxHeight      int  `toml:"max-height"`
+	Style          string `toml:"style"`
+	GhostText      bool   `toml:"ghost-text"`
+	MaxSuggestions int    `toml:"max-suggestions"`
+	MaxHeight      int    `toml:"max-height"`
+	NerdFonts      bool   `toml:"nerd-fonts"`
 }
 
 type GitConfig struct {

config/defaults.go

@@ -11,9 +11,11 @@ func DefaultConfig() *Config {
 			Debug:   false,
 		},
 		UI: UIConfig{
+			Style:          "modern",
 			GhostText:      true,
 			MaxSuggestions: 100,
 			MaxHeight:      15,
+			NerdFonts:      true,
 		},
 		Git: GitConfig{
 			FilterActiveBranch:  true,