feat: Add networking commands for z3ed CLI

- Implemented new CLI commands for network operations, including `net connect`, `net join`, `net leave`, and `net proposal` for real-time collaboration.
- Enhanced the `CollaborationService` and `WebSocketClient` to support session management and proposal submissions.
- Updated `README.md` to include usage instructions for the new networking commands and features.
- Improved CMake configuration to include new source files for networking functionalities.

src/cli/handlers/net/net_commands.h

@@ -0,0 +1,48 @@
+#ifndef YAZE_CLI_HANDLERS_NET_NET_COMMANDS_H_
+#define YAZE_CLI_HANDLERS_NET_NET_COMMANDS_H_
+
+#include <string>
+#include <vector>
+
+#include "absl/status/status.h"
+#include "cli/service/net/z3ed_network_client.h"
+
+namespace yaze {
+namespace cli {
+namespace net {
+
+/**
+ * Handle 'z3ed net connect' command
+ */
+absl::Status HandleNetConnect(const std::vector<std::string>& args);
+
+/**
+ * Handle 'z3ed net join' command
+ */
+absl::Status HandleNetJoin(const std::vector<std::string>& args);
+
+/**
+ * Handle 'z3ed net leave' command
+ */
+absl::Status HandleNetLeave(const std::vector<std::string>& args);
+
+/**
+ * Handle 'z3ed net proposal' command
+ */
+absl::Status HandleNetProposal(const std::vector<std::string>& args);
+
+/**
+ * Handle 'z3ed net status' command
+ */
+absl::Status HandleNetStatus(const std::vector<std::string>& args);
+
+// Proposal subcommands
+absl::Status HandleProposalSubmit(const std::vector<std::string>& args);
+absl::Status HandleProposalStatus(const std::vector<std::string>& args);
+absl::Status HandleProposalWait(const std::vector<std::string>& args);
+
+}  // namespace net
+}  // namespace cli
+}  // namespace yaze
+
+#endif  // YAZE_CLI_HANDLERS_NET_NET_COMMANDS_H_