chore: Extract languages from zed crate (#8270)

- Moves languages module from `zed` into a separate crate. That way we
have less of a long pole at the end of compilation.
- Removes moot dependencies on editor/picker. This is totally harmless
and might help in the future if we decide to decouple picker from
editor.

Before:
```
Number of crates that depend on 'picker' but not on 'editor': 1
Total number of crates that depend on 'picker': 13
Total number of crates that depend on 'editor': 30
```
After:
```
Number of crates that depend on 'picker' but not on 'editor': 5
Total number of crates that depend on 'picker': 12
Total number of crates that depend on 'editor': 26
```
The more crates depend on just picker but not editor, the better in that
case.

Release Notes:

- N/A

crates/editor/src/display_map/block_map.rs

@@ -2,10 +2,11 @@ use super::{
     wrap_map::{self, WrapEdit, WrapPoint, WrapSnapshot},
     Highlights,
 };
-use crate::{Anchor, Editor, EditorStyle, ExcerptId, ExcerptRange, GutterDimensions, ToPoint as _};
+use crate::{EditorStyle, GutterDimensions};
 use collections::{Bound, HashMap, HashSet};
-use gpui::{AnyElement, ElementContext, Pixels, View};
+use gpui::{AnyElement, ElementContext, Pixels};
 use language::{BufferSnapshot, Chunk, Patch, Point};
+use multi_buffer::{Anchor, ExcerptId, ExcerptRange, ToPoint as _};
 use parking_lot::Mutex;
 use std::{
     cell::RefCell,
@@ -85,7 +86,6 @@ pub enum BlockStyle {
 
 pub struct BlockContext<'a, 'b> {
     pub context: &'b mut ElementContext<'a>,
-    pub view: View<Editor>,
     pub anchor_x: Pixels,
     pub max_width: Pixels,
     pub gutter_dimensions: &'b GutterDimensions,

crates/editor/src/display_map/fold_map.rs

@@ -2,9 +2,9 @@ use super::{
     inlay_map::{InlayBufferRows, InlayChunks, InlayEdit, InlayOffset, InlayPoint, InlaySnapshot},
     Highlights,
 };
-use crate::{Anchor, AnchorRangeExt, MultiBufferSnapshot, ToOffset};
 use gpui::{ElementId, HighlightStyle, Hsla};
 use language::{Chunk, Edit, Point, TextSummary};
+use multi_buffer::{Anchor, AnchorRangeExt, MultiBufferSnapshot, ToOffset};
 use std::{
     any::TypeId,
     cmp::{self, Ordering},

crates/editor/src/display_map/inlay_map.rs

@@ -1,8 +1,8 @@
-use crate::{Anchor, InlayId, MultiBufferSnapshot, ToOffset};
+use crate::InlayId;
 use collections::{BTreeMap, BTreeSet};
 use gpui::HighlightStyle;
 use language::{Chunk, Edit, Point, TextSummary};
-use multi_buffer::{MultiBufferChunks, MultiBufferRows};
+use multi_buffer::{Anchor, MultiBufferChunks, MultiBufferRows, MultiBufferSnapshot, ToOffset};
 use std::{
     any::TypeId,
     cmp,

crates/editor/src/display_map/tab_map.rs

@@ -2,8 +2,8 @@ use super::{
     fold_map::{self, FoldChunks, FoldEdit, FoldPoint, FoldSnapshot},
     Highlights,
 };
-use crate::MultiBufferSnapshot;
 use language::{Chunk, Point};
+use multi_buffer::MultiBufferSnapshot;
 use std::{cmp, mem, num::NonZeroU32, ops::Range};
 use sum_tree::Bias;
 

crates/editor/src/display_map/wrap_map.rs

@@ -3,10 +3,10 @@ use super::{
     tab_map::{self, TabEdit, TabPoint, TabSnapshot},
     Highlights,
 };
-use crate::MultiBufferSnapshot;
 use gpui::{AppContext, Context, Font, LineWrapper, Model, ModelContext, Pixels, Task};
 use language::{Chunk, Point};
 use lazy_static::lazy_static;
+use multi_buffer::MultiBufferSnapshot;
 use smol::future::yield_now;
 use std::{cmp, collections::VecDeque, mem, ops::Range, time::Duration};
 use sum_tree::{Bias, Cursor, SumTree};