WIP: Make App the only entry point from main

Co-Authored-By: Max Brunsfeld <maxbrunsfeld@gmail.com>

zed/src/workspace/mod.rs

@@ -12,7 +12,7 @@ use crate::{settings::Settings, watch};
 use gpui::{App, MutableAppContext};
 use std::path::PathBuf;
 
-pub fn init(app: &mut App) {
+pub fn init(app: &mut MutableAppContext) {
     app.add_global_action("workspace:open_paths", open_paths);
     app.add_global_action("app:quit", quit);
     pane::init(app);

zed/src/workspace/pane.rs

@@ -5,11 +5,11 @@ use gpui::{
     elements::*,
     geometry::{rect::RectF, vector::vec2f},
     keymap::Binding,
-    App, AppContext, Border, Entity, Quad, View, ViewContext,
+    App, AppContext, Border, Entity, MutableAppContext, Quad, View, ViewContext,
 };
 use std::cmp;
 
-pub fn init(app: &mut App) {
+pub fn init(app: &mut MutableAppContext) {
     app.add_action(
         "pane:activate_item",
         |pane: &mut Pane, index: &usize, ctx| {

zed/src/workspace/workspace_view.rs

@@ -8,7 +8,7 @@ use gpui::{
 use log::{error, info};
 use std::{collections::HashSet, path::PathBuf};
 
-pub fn init(app: &mut App) {
+pub fn init(app: &mut MutableAppContext) {
     app.add_action("workspace:save", WorkspaceView::save_active_item);
     app.add_action("workspace:debug_elements", WorkspaceView::debug_elements);
     app.add_bindings(vec![