finish refactor, add docs and CI

include/nxst/infra/net/socket.hpp

@@ -6,13 +6,24 @@ struct Socket {
 
     Socket() = default;
     explicit Socket(int fd) : fd(fd) {}
-    ~Socket() { if (fd >= 0) close(fd); }
+    ~Socket() {
+        if (fd >= 0)
+            close(fd);
+    }
 
-    Socket(const Socket&)            = delete;
+    Socket(const Socket&) = delete;
     Socket& operator=(const Socket&) = delete;
-    Socket(Socket&& o) : fd(o.fd) { o.fd = -1; }
+    Socket(Socket&& o) : fd(o.fd) {
+        o.fd = -1;
+    }
 
-    operator int()   const { return fd; }
-    bool valid()     const { return fd >= 0; }
-    void release()         { fd = -1; }
+    operator int() const {
+        return fd;
+    }
+    bool valid() const {
+        return fd >= 0;
+    }
+    void release() {
+        fd = -1;
+    }
 };