chore: 初始化 Slurm Go SDK 项目骨架和核心客户端

添加 Go 模块定义、.gitignore、包文档、HTTP Client 核心、Token 认证和错误处理。

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/slurm/auth.go

@@ -0,0 +1,39 @@
+package slurm
+
+import "net/http"
+
+// TokenAuthTransport implements http.RoundTripper and injects
+// X-SLURM-USER-NAME and X-SLURM-USER-TOKEN headers into every request.
+type TokenAuthTransport struct {
+	UserName string
+	Token    string
+
+	// Base is the underlying RoundTripper. If nil, http.DefaultTransport is used.
+	Base http.RoundTripper
+}
+
+// RoundTrip executes a single HTTP request, adding Slurm authentication headers.
+func (t *TokenAuthTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	req2 := cloneRequest(req)
+	req2.Header.Set("X-SLURM-USER-NAME", t.UserName)
+	req2.Header.Set("X-SLURM-USER-TOKEN", t.Token)
+	return t.transport().RoundTrip(req2)
+}
+
+// Client returns a new http.Client that uses this TokenAuthTransport.
+func (t *TokenAuthTransport) Client() *http.Client {
+	return &http.Client{Transport: t}
+}
+
+func (t *TokenAuthTransport) transport() http.RoundTripper {
+	if t.Base != nil {
+		return t.Base
+	}
+	return http.DefaultTransport
+}
+
+// cloneRequest creates a shallow copy of the request with a deep copy of the headers.
+func cloneRequest(req *http.Request) *http.Request {
+	r := req.Clone(req.Context())
+	return r
+}