更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/tsutils/util/usage.d.ts

@@ -0,0 +1,30 @@
+import * as ts from 'typescript';
+export interface VariableInfo {
+    domain: DeclarationDomain;
+    exported: boolean;
+    uses: VariableUse[];
+    inGlobalScope: boolean;
+    declarations: ts.Identifier[];
+}
+export interface VariableUse {
+    domain: UsageDomain;
+    location: ts.Identifier;
+}
+export declare enum DeclarationDomain {
+    Namespace = 1,
+    Type = 2,
+    Value = 4,
+    Import = 8,
+    Any = 7
+}
+export declare enum UsageDomain {
+    Namespace = 1,
+    Type = 2,
+    Value = 4,
+    ValueOrNamespace = 5,
+    Any = 7,
+    TypeQuery = 8
+}
+export declare function getUsageDomain(node: ts.Identifier): UsageDomain | undefined;
+export declare function getDeclarationDomain(node: ts.Identifier): DeclarationDomain | undefined;
+export declare function collectVariableUsage(sourceFile: ts.SourceFile): Map<ts.Identifier, VariableInfo>;