Job Submission CLI (#122)

* Initial commit of job submission cli tool, with minor fixes in API code

* Refactored and further decoupled server / client code

* Clean up ServerProxy to not use hardcoded loopback addresses

client.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+import logging
+import threading
+from collections import deque
+
+from server import start_server
+
+logger = logging.getLogger()
+
+def __setup_buffer_handler():
+    # lazy load GUI frameworks
+    from PyQt6.QtCore import QObject, pyqtSignal
+
+    class BufferingHandler(logging.Handler, QObject):
+        new_record = pyqtSignal(str)
+
+        def __init__(self, capacity=100):
+            logging.Handler.__init__(self)
+            QObject.__init__(self)
+            self.buffer = deque(maxlen=capacity)  # Define a buffer with a fixed capacity
+
+        def emit(self, record):
+            try:
+                msg = self.format(record)
+                self.buffer.append(msg)  # Add message to the buffer
+                self.new_record.emit(msg)  # Emit signal
+            except RuntimeError:
+                pass
+
+        def get_buffer(self):
+            return list(self.buffer)  # Return a copy of the buffer
+
+    buffer_handler = BufferingHandler()
+    buffer_handler.setFormatter(logging.getLogger().handlers[0].formatter)
+    new_logger = logging.getLogger()
+    new_logger.addHandler(buffer_handler)
+    return buffer_handler
+
+
+def __show_gui(buffer_handler):
+    # lazy load GUI frameworks
+    from PyQt6.QtWidgets import QApplication
+
+    # load application
+    app: QApplication = QApplication(sys.argv)
+    if app.style().objectName() != 'macos':
+        app.setStyle('Fusion')
+
+    # configure main window
+    from src.ui.main_window import MainWindow
+    window: MainWindow = MainWindow()
+    window.buffer_handler = buffer_handler
+    window.show()
+
+    return app.exec()
+
+if __name__ == '__main__':
+    import sys
+
+    local_server_thread = threading.Thread(target=start_server, args=[True], daemon=True)
+    local_server_thread.start()
+    __show_gui(__setup_buffer_handler())
+    sys.exit()