fix: rename manager module to git.zkcoi.com/zkcoi/Meshray-Manager

- go.mod module path matches repo zkcoi/Meshray-Manager (case-distinct from zkcoi/Meshray/core)
- rewrite internal imports meshray/{internal,web,pkg} -> Meshray-Manager/... (core refs kept)
- sync README.md / install.sh repo URLs; add CHANGELOG entry

internal/api/dto/responses.go

@@ -3,7 +3,7 @@ package dto
 import (
 	"fmt"
 
-	"git.zkcoi.com/zkcoi/meshray/internal/model"
+	"git.zkcoi.com/zkcoi/Meshray-Manager/internal/model"
 )
 
 // NetworkResponse 网络响应 DTO（ID 为字符串格式，避免 JavaScript 精度丢失）