Auto merge of #11557 - bruno-ortiz:rust-dependencies, r=bruno-ortiz

Creating rust dependencies tree explorer

Hello!

I tried to implement a tree view that shows the dependencies of a project.

It allows to see all dependencies to the project and it uses `cargo tree` for it. Also it allows to click and open the files, the viewtree tries its best to follow the openned file in the editor.

Here is an example:
![image](https://user-images.githubusercontent.com/5748995/155822183-1e227c7b-7929-4fc8-8eed-29ccfc5e14fe.png)

Any feedback is welcome since i have basically no professional experience with TS.

1 files changed, 24 insertions, 1 deletions

diff --git a/docs/dev/lsp-extensions.md b/docs/dev/lsp-extensions.md
index 42f58fee30e..a4ad3e5a553 100644
--- a/docs/dev/lsp-extensions.md
+++ b/docs/dev/lsp-extensions.md
@@ -1,5 +1,5 @@
 <!---
-lsp_ext.rs hash: 31ca513a249753ab
+lsp_ext.rs hash: fdf1afd34548abbc
 
 If you need to change the above hash to make the test pass, please check if you
 need to adjust this doc as well and ping this issue:
@@ -851,3 +851,26 @@ export interface Diagnostic {
         rendered?: string;
     };
 }
+```
+
+## Dependency Tree
+
+**Method:** `rust-analyzer/fetchDependencyList`
+
+**Request:**
+
+```typescript
+export interface FetchDependencyListParams {}
+```
+
+**Response:** 
+```typescript
+export interface FetchDependencyListResult {
+    crates: {
+        name: string;
+        version: string;
+        path: string;
+    }[];
+}
+```
+Returns all crates from this workspace, so it can be used create a viewTree to help navigate the dependency tree.
\ No newline at end of file