Allow .zed/tasks.json local configs (#8536)

![image](https://github.com/zed-industries/zed/assets/2690773/e1511777-b4ca-469e-8636-1e513b615368)

Follow-up of
https://github.com/zed-industries/zed/issues/7108#issuecomment-1960746397

Makes more clear where each task came from, auto (re)load
.zed/config.json changes, properly filtering out other worktree tasks.

Release Notes:

- Added local task configurations

crates/picker/src/picker.rs

@@ -8,6 +8,8 @@ use std::{sync::Arc, time::Duration};
 use ui::{prelude::*, v_flex, Color, Divider, Label, ListItem, ListItemSpacing};
 use workspace::ModalView;
 
+pub mod highlighted_match_with_paths;
+
 enum ElementContainer {
     List(ListState),
     UniformList(UniformListScrollHandle),