improvement: Polish clis in DataStreamSuite

Specifically PubSubServer, DataStreamPublisher and DSQA

* Use CommandLineParser (nuget pkg)
* Clean up csproj files a bit while we're at it

src/DataStreamSuite/DataStreamQueryAnalyzer/Program.cs

@@ -1,40 +1,46 @@
 using BCG;
 
-using bts.utils;
+using bts;
+using bts.api.core;
+
+using Bts.DataStreamQueryAnalyzer;
+
+using CommandLine;
 
 using mbts.config;
 
 using System;
-using System.Linq;
-using System.Windows.Forms;
 using System.Threading.Tasks;
-using System.ComponentModel;
+using System.Windows.Forms;
 
 static class Program {
-   static void init(string[] args) {
-      Func<string, string, Task> login = async (l, p) => {
-         var login = l;
-         var passwd = p;
-         var service_ctx = bts.api.core.ServiceContext.create();
-         await service_ctx.login(login, passwd);
-      };
-      BTSNativeMethods.provide_command_line(args, args.Length);
-      Configuration.initialize();
-      Task.Run(async () => await login("bts", String.Empty));
-   }
    [STAThread]
-   static void Main(string[] args) {
-      init(args);
-      string args_concat = String.Empty;
-      args.ToList().ForEach(t => args_concat += t);
-      var init_log = $"Starting DSQA args: {args_concat} len: {args.Length}";
-      bts.Log.Gen.info(init_log);
-      Console.WriteLine(init_log);
-      Console.WriteLine("Launching Main Window");
-      MainForm mainForm = new MainForm();
-      if (args.Length > 0) {
-         mainForm.loadFile(args[0]);
+   static async Task Main(string[] args) {
+      await Parser.Default.ParseArguments<DataStreamQueryAnalyzerConfig>(args)
+         .MapResult(RunAsync, errs => Task.FromResult(1));
+
+      async Task<int> RunAsync(DataStreamQueryAnalyzerConfig cfg) {
+         try {
+            cfg.MergeWithConfigFile();
+            Configuration.initialize(cfg.Sparkd);
+            Log.Gen.info("Starting DataStreamQueryAnalyzer");
+            var service_ctx = ServiceContext.create(cfg.Sparkd);
+            await service_ctx.login(cfg.User ?? "bts", cfg.Password ?? string.Empty);
+            Log.Gen.info("Launching Main Window");
+            var mainForm = new MainForm();
+            if (cfg.StreamFile is not null) {
+               mainForm.loadFile(cfg.StreamFile);
+            }
+            Application.Run(mainForm);
+         } catch (Exception ex) {
+            // Write the error to console first, in case the logging system is compromised.
+            var error_msg = $"DataStreamPublisher threw exception:\n{ex}";
+            Console.Error.WriteLine(error_msg);
+            Console.Error.Flush();
+            bts.Log.Gen.error(error_msg);
+            return 1;
+         }
+         return 0;
       }
-      Application.Run(mainForm);
    }
 }