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/controller/admin/my/peer.go

@@ -12,18 +12,18 @@ import (
 type Peer struct {
 }
 
-// List 列表
-// @Tags 我的设备
-// @Summary 设备列表
-// @Description 设备列表
+// List list
+// @Tags my devices
+// @Summary device list
+// @Description device list
 // @Accept  json
 // @Produce  json
-// @Param page query int false "页码"
-// @Param page_size query int false "页大小"
-// @Param time_ago query int false "时间"
+// @Param page query int false "page number"
+// @Param page_size query int false "page size"
+// @Param time_ago query int false "time"
 // @Param id query string false "ID"
-// @Param hostname query string false "主机名"
-// @Param uuids query string false "uuids 用逗号分隔"
+// @Param hostname query string false "hostname"
+// @Param uuids query string false "uuids separated by commas"
 // @Success 200 {object} response.Response{data=model.PeerList}
 // @Failure 500 {object} response.Response
 // @Router /admin/my/peer/list [get]