Switch from clap to yazap

This is compatible with the latest 0.16.0 nightly build.
It is also a bit less magic than clap.

src/server/main.zig

@@ -3,7 +3,7 @@ const Message = @import("./message_parser.zig");
 
 const ClientState = @import("./client.zig");
 
-const ServerInfo = struct {
+pub const ServerInfo = struct {
     /// The unique identifier of the NATS server.
     server_id: []const u8,
     /// The name of the NATS server.
@@ -18,7 +18,7 @@ const ServerInfo = struct {
     host: []const u8 = "0.0.0.0",
     /// The port number the NATS server is configured
     /// to listen on.
-    port: u16 = 6868,
+    port: u16 = 4222,
     /// Whether the server supports headers.
     headers: bool = false,
     /// Maximum payload size, in bytes, that the server
@@ -36,9 +36,8 @@ clients: std.AutoHashMapUnmanaged(u64, ClientState) = .empty,
 /// Map of subjects to client IDs that are subscribed to that subject.
 subscriptions: std.StringHashMapUnmanaged(std.ArrayList(u64)),
 
-pub fn main(gpa: std.mem.Allocator, iter: *std.process.ArgIterator, main_args: anytype) !void {
+pub fn main(gpa: std.mem.Allocator, main_args: anytype) !void {
     _ = gpa;
-    _ = iter;
     _ = main_args;
 }
 
@@ -107,3 +106,11 @@ fn writeInfo(out: *std.Io.Writer, info: ServerInfo) !void {
     _ = try out.write("\r\n");
     try out.flush();
 }
+
+pub fn createId() []const u8 {
+    return "SERVERID";
+}
+
+pub fn createName() []const u8 {
+    return "SERVERNAME";
+}