feat: add mvp language server (#8515)

Resolves #8400

cli/tsc/compiler.d.ts

@@ -0,0 +1,103 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+// Contains types that can be used to validate and check `99_main_compiler.js`
+
+import * as _ts from "../dts/typescript";
+
+declare global {
+  // deno-lint-ignore no-namespace
+  namespace ts {
+    var libs: string[];
+    var libMap: Map<string, string>;
+
+    interface SourceFile {
+      version?: string;
+    }
+
+    interface Performance {
+      enable(): void;
+      getDuration(value: string): number;
+    }
+
+    var performance: Performance;
+  }
+
+  // deno-lint-ignore no-namespace
+  namespace ts {
+    export = _ts;
+  }
+
+  interface Object {
+    // deno-lint-ignore no-explicit-any
+    __proto__: any;
+  }
+
+  interface DenoCore {
+    // deno-lint-ignore no-explicit-any
+    jsonOpSync<T>(name: string, params: T): any;
+    ops(): void;
+    print(msg: string): void;
+    registerErrorClass(name: string, Ctor: typeof Error): void;
+  }
+
+  type LanguageServerRequest =
+    | ConfigureRequest
+    | GetSyntacticDiagnosticsRequest
+    | GetSemanticDiagnosticsRequest
+    | GetSuggestionDiagnosticsRequest
+    | GetQuickInfoRequest
+    | GetDocumentHighlightsRequest
+    | GetReferencesRequest
+    | GetDefinitionRequest;
+
+  interface BaseLanguageServerRequest {
+    id: number;
+    method: string;
+  }
+
+  interface ConfigureRequest extends BaseLanguageServerRequest {
+    method: "configure";
+    // deno-lint-ignore no-explicit-any
+    compilerOptions: Record<string, any>;
+  }
+
+  interface GetSyntacticDiagnosticsRequest extends BaseLanguageServerRequest {
+    method: "getSyntacticDiagnostics";
+    specifier: string;
+  }
+
+  interface GetSemanticDiagnosticsRequest extends BaseLanguageServerRequest {
+    method: "getSemanticDiagnostics";
+    specifier: string;
+  }
+
+  interface GetSuggestionDiagnosticsRequest extends BaseLanguageServerRequest {
+    method: "getSuggestionDiagnostics";
+    specifier: string;
+  }
+
+  interface GetQuickInfoRequest extends BaseLanguageServerRequest {
+    method: "getQuickInfo";
+    specifier: string;
+    position: number;
+  }
+
+  interface GetDocumentHighlightsRequest extends BaseLanguageServerRequest {
+    method: "getDocumentHighlights";
+    specifier: string;
+    position: number;
+    filesToSearch: string[];
+  }
+
+  interface GetReferencesRequest extends BaseLanguageServerRequest {
+    method: "getReferences";
+    specifier: string;
+    position: number;
+  }
+
+  interface GetDefinitionRequest extends BaseLanguageServerRequest {
+    method: "getDefinition";
+    specifier: string;
+    position: number;
+  }
+}