chore: initialize project with Go module and tooling

config.example.yaml

@@ -0,0 +1,13 @@
+# VoicePaste config
+# Environment variables override these values (prefix: none, direct mapping)
+
+# 火山引擎豆包 ASR 配置
+doubao:
+  app_key: ""       # env: DOUBAO_APP_KEY
+  access_key: ""    # env: DOUBAO_ACCESS_KEY
+  resource_id: "volc.seedasr.sauc.duration"  # env: DOUBAO_RESOURCE_ID
+
+# 服务配置
+server:
+  port: 8443        # env: PORT
+  tls_auto: true    # env: TLS_AUTO — 自动 TLS (AnyIP + 自签名降级)