Rearranged the code and added CLI that installs tools locally.

src/core/platform.ts

@@ -0,0 +1,31 @@
+import * as os from 'os';
+
+export interface PlatformInfo {
+  system: string;
+  arch: string;
+  systemPattern: string;
+  archPattern: string;
+}
+
+export const systemPatterns: Record<string, string> = {
+  linux: 'linux',
+  darwin: '(darwin|macos|mac|osx)',
+  win32: '(windows|win)'
+};
+
+export const archPatterns: Record<string, string> = {
+  x64: '(x86_64|x64|amd64)',
+  arm64: '(aarch64|arm64)'
+};
+
+export function getPlatformInfo(): PlatformInfo {
+  const system = os.platform();
+  const arch = os.arch();
+
+  return {
+    system,
+    arch,
+    systemPattern: systemPatterns[system] || system,
+    archPattern: archPatterns[arch] || arch
+  };
+}