New tab opens on current directory

This patch add a new feature, now tab behavior now inherits the
active tab’s current directory on Linux controlled by a settings
toggle, and default is off

src/config.rs

@@ -235,6 +235,8 @@ pub struct Config {
     pub syntax_theme_dark: String,
     pub syntax_theme_light: String,
     pub focus_follow_mouse: bool,
+    #[serde(default)]
+    pub tab_new_inherit_working_directory: bool,
     pub default_profile: Option<ProfileId>,
     #[serde(default)]
     pub shortcuts_custom: Shortcuts,
@@ -249,6 +251,7 @@ impl Default for Config {
             color_schemes_light: BTreeMap::new(),
             dim_font_weight: Weight::NORMAL.0,
             focus_follow_mouse: false,
+            tab_new_inherit_working_directory: false,
             font_name: "Noto Sans Mono".to_string(),
             font_size: 14,
             font_size_zoom_step_mul_100: 100,