refactor: reorganize modules and add Linux build tooling

module/social/relation/proto/follow.proto

@@ -0,0 +1,22 @@
+syntax = "proto3";
+package relation;
+option go_package = ".;relation"; 
+import "blocks.proto";
+
+// relation-关系管理:关注
+service Follow{
+    // 执行关注
+    rpc Doing(IdentRequest) returns (StatusReply) {} 
+
+    // 撤销关注
+    rpc Undo(IdentRequest) returns (StatusReply) {} 
+
+    // 关注状态
+    rpc State(IdentRequest) returns (StatusReply) {} 
+
+    // 获取关注列表
+    rpc Fetch(FetchRequest) returns (FetchRelationItemReply) {} 
+}
+
+
+