typescript-language-server: fix requires typescript

typescript-language-server had an override that used lndir to
provide the typescript dependency. When typescript-language-server
was moved, this was not included.

pkgs/by-name/ty/typescript-language-server/default-fallbackTsserverPath.diff

@@ -0,0 +1,15 @@
+diff --git a/src/lsp-server.ts b/src/lsp-server.ts
+index ef5907d..9494430 100644
+--- a/src/lsp-server.ts
++++ b/src/lsp-server.ts
+@@ -323,6 +323,10 @@ export class LspServer {
+             }
+         }
+
++        if (!fallbackTsserverPath) {
++            fallbackTsserverPath = "@typescript@";
++        }
++
+         const fallbackVersionProvider = new TypeScriptVersionProvider(fallbackTsserverPath, this.logger);
+         const fallbackSettingVersion = fallbackVersionProvider.getUserSettingVersion();
+         if (fallbackSettingVersion) {

pkgs/by-name/ty/typescript-language-server/package.nix

@@ -6,8 +6,10 @@
 , makeWrapper
 , nodejs
 , prefetch-yarn-deps
+, substituteAll
 , yarn
 , testers
+, typescript
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -21,6 +23,13 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-FCv0+tA7AuCdGeG6FEiMyRAHcl0WbezhNYLL7xp5FWU=";
   };
 
+  patches = [
+    (substituteAll {
+      src = ./default-fallbackTsserverPath.diff;
+      typescript = "${typescript}/lib/node_modules/typescript/lib/tsserver.js";
+    })
+  ];
+
   offlineCache = fetchYarnDeps {
     yarnLock = "${finalAttrs.src}/yarn.lock";
     hash = "sha256-nSMhPfbWD93sGIKehBBE/bh4RzHXFtGAjeyG20m/LWQ=";