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/ctr/core_enable.go

@@ -5,4 +5,4 @@
 // 默认构建不编译本文件，因此管理器可独立编译、以标准 WireGuard 直连运行。
 package ctr
 
-import _ "git.zkcoi.com/zkcoi/meshray/internal/ctr/corebind"
+import _ "git.zkcoi.com/zkcoi/Meshray-Manager/internal/ctr/corebind"