Get diagnostics view almost building in the zed2 world

Co-Authored-By: Nathan Sobo <nathan@zed.dev>

Cargo.lock

@@ -2573,6 +2573,34 @@ dependencies = [
  "workspace",
 ]
 
+[[package]]
+name = "diagnostics2"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "client2",
+ "collections",
+ "editor2",
+ "futures 0.3.28",
+ "gpui2",
+ "language2",
+ "log",
+ "lsp2",
+ "postage",
+ "project2",
+ "schemars",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "settings2",
+ "smallvec",
+ "theme2",
+ "ui2",
+ "unindent",
+ "util",
+ "workspace2",
+]
+
 [[package]]
 name = "diff"
 version = "0.1.13"