Add an option in get_server function to not use signals

[xavArtley]

I have an application where I have not access to the main python thread
I'd like to be able to launch a server with the panel utility function get_server
I simulate what should be achieved with a MRE:

Associated code

import panel as pn
from panel.io.server import get_server, StoppableThread
slider = pn.widgets.FloatSlider()
class PanelServerThread(StoppableThread):
    
    def run(self):
        import asyncio
        asyncio.set_event_loop(asyncio.new_event_loop())
        self.server = get_server(slider, port=5006)
        self.server.start()
        self.server.io_loop.start()

th = PanelServerThread()
th.start()
slider.value = 0.5

However to make this code works I had to comment the line 95 in panel.io.server.py
If not I get thiss error:

Exception in thread Thread-18:
Traceback (most recent call last):
  File "D:\CIVA_RP\civa-rep\ProjetCIVA\ceaComponents\dev\python\lib\threading.py", line 916, in _bootstrap_inner
    self.run()
  File "<ipython-input-3-97ff3fa09bcb>", line 7, in run
    self.server = get_server(slider, port=5006)
  File "D:\CIVA_RP\civa-rep\ProjetCIVA\ceaComponents\dev\python\lib\site-packages\panel\io\server.py", line 95, in get_server
    signal.signal(signal.SIGINT, sig_exit)
  File "D:\CIVA_RP\civa-rep\ProjetCIVA\ceaComponents\dev\python\lib\signal.py", line 47, in signal
    handler = _signal.signal(_enum_to_int(signalnum), _enum_to_int(handler))
ValueError: signal only works in main thread

So I'd like to request may be an argument to make it optional