make the test suite and openapi generator platform-independent

Windows checkouts turned LF into CRLF (core.autocrlf=true), and several
tests plus the openapi generator hardcoded LF or POSIX path separators.
The result was a suite that was green on Linux CI but red on Windows, and
an openapi.json whose /api/hermes/* routes silently disappeared when
generated on Windows.

Pin the repository to LF via .gitattributes, strip shebangs before
Vite's SSR transform, and key route files by their posix path. Add a
manually triggered macOS verification workflow so the same checks run
on a self-hosted macOS runner.

tests/server/hermes-plugins-config.test.ts

@@ -4,7 +4,9 @@ import { join } from 'path'
 import YAML from 'js-yaml'
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 
-describe('Hermes plugin configuration', () => {
+// 假 python 是 #!/bin/sh 脚本，插件发现依赖 POSIX 的 shebang 解析链路。
+// Windows 上没有 shebang 执行语义，整组跳过而不是伪造结果。
+describe.skipIf(process.platform === 'win32')('Hermes plugin configuration', () => {
   const originalEnv = { ...process.env }
   let tempDir = ''