Add file_finder module

Still need to wire up key bindings to make it toggle.

Co-Authored-By: Antonio Scandurra <me@as-cii.com>

zed/src/workspace/pane.rs

@@ -1,8 +1,7 @@
 use super::{ItemViewHandle, SplitDirection};
 use crate::{settings::Settings, watch};
 use gpui::{
-    color::ColorU, elements::*, keymap::Binding, App, AppContext, Border, ChildView, Entity, View,
-    ViewContext,
+    color::ColorU, elements::*, keymap::Binding, App, AppContext, Border, Entity, View, ViewContext,
 };
 use std::cmp;
 

zed/src/workspace/pane_group.rs

@@ -2,7 +2,7 @@ use anyhow::{anyhow, Result};
 use gpui::{
     color::{rgbu, ColorU},
     elements::*,
-    Axis, Border, ChildView,
+    Axis, Border,
 };
 
 #[derive(Clone, Debug, Eq, PartialEq)]

zed/src/workspace/workspace_view.rs

@@ -1,9 +1,8 @@
 use super::{pane, Pane, PaneGroup, SplitDirection, Workspace};
 use crate::{settings::Settings, watch};
-use gpui::{color::rgbu, ChildView};
 use gpui::{
-    elements::*, AnyViewHandle, AppContext, Entity, ModelHandle, MutableAppContext, View,
-    ViewContext, ViewHandle,
+    color::rgbu, elements::*, AnyViewHandle, AppContext, Entity, ModelHandle, MutableAppContext,
+    View, ViewContext, ViewHandle,
 };
 use log::{error, info};
 use std::{collections::HashSet, path::PathBuf};