Switch LSP prompts to use a non-blocking toast (#8312)

This fixes a major degradation in usability that some users ran into.

Fixes https://github.com/zed-industries/zed/issues/8255 
Fixes https://github.com/zed-industries/zed/issues/8229

Release Notes:

- Switch from using platform prompts to toasts for LSP prompts.
([8255](https://github.com/zed-industries/zed/issues/8255),
[8229](https://github.com/zed-industries/zed/issues/8229))

<img width="583" alt="Screenshot 2024-02-23 at 2 40 05 PM"
src="https://github.com/zed-industries/zed/assets/2280405/1bfc027b-b7a8-4563-88b6-020e47869668">

Co-authored-by: Marshall <marshall@zed.dev>

crates/ui/src/components/label/label_like.rs

@@ -7,6 +7,7 @@ use crate::prelude::*;
 pub enum LabelSize {
     #[default]
     Default,
+    Large,
     Small,
     XSmall,
 }
@@ -97,6 +98,7 @@ impl RenderOnce for LabelLike {
                 )
             })
             .map(|this| match self.size {
+                LabelSize::Large => this.text_ui_lg(),
                 LabelSize::Default => this.text_ui(),
                 LabelSize::Small => this.text_ui_sm(),
                 LabelSize::XSmall => this.text_ui_xs(),