i18n: Translate all Chinese to English across the codebase

Translate Chinese comments, log/error messages, validator labels and
Swagger annotations to English throughout the source code, generated
Swagger docs, config files and CI workflows.

Make the English README primary: README.md now holds the English docs
and README_EN.md holds the Chinese version, with cross-language links
updated accordingly.

Note: the generated docs/ swagger files were translated in place; run
`go generate ./...` (swag init) to regenerate them from the now-English
annotations when a Go toolchain is available.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

http/request/api/oauth.go

@@ -1,7 +1,7 @@
 package api
 
 type OidcAuthRequest struct {
-	DeviceInfo DeviceInfoInLogin `json:"deviceInfo" label:"设备信息"`
+	DeviceInfo DeviceInfoInLogin `json:"deviceInfo" label:"device info"`
 	Id         string            `json:"id"  label:"id"`
 	Op         string            `json:"op" label:"op"`
 	Uuid       string            `json:"uuid"  label:"uuid"`