PluginActions for connecting/disconnecting a session

[boatbomber]

Widget space is a precious resource on my 14 inch laptop, and the Rojo widget was wasting space for me most of the time. I simply pressed connect or disconnect and that was all. A simple keybinding would suffice for that common use case, but one didn't exist so I forked and added it.

I used a PluginAction so that users may go to File > Advanced > Customize Shortcuts in the Studio menu to set the keybinding. (We cannot set a default keybinding because Roblox still has not added that functionality, please support this feature request.)

This PR adds a StudioPluginAction component, exposes the endSession function, and uses those to create plugin actions that start/end the session. Because it is done from within App, the keybinding will appropriately update the widget state.

There are three actions. One is a toggle- it will connect or disconnect, depending upon the current session state. The other two are connect and disconnect respectively. This allows the user to choose which to bind and decide if they prefer a single keybind for both actions or unique keybinds for each.

keybindDemo.mp4

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A few things before this PR is ready to merge:

• Should respect settings
• Should print/warn in the output upon successful connect/disconnect
• Should connect to non-default host/port if user has typed into the widget (?)

[unix-system]

Support for this! Would love to see merged.

As an extra convenience - perhaps an option in the Rojo settings that would create a PluginToolbarButton button on the Toolbar specifically for starting and stopping without having to open the full menu (?)

[boatbomber]

As an extra convenience - perhaps an option in the Rojo settings that would create a PluginToolbarButton button on the Toolbar specifically for starting and stopping without having to open the full menu (?)

@unix-system What would the button offer over the keybind? I personally almost never have the Plugin ribbon open on top, because I need to access the other buttons in ribbons like Script and Test.
Additionally, my Plugins ribbon is crowded enough as it is without adding another button that already has two alternatives.

[boatbomber]

Some folks pointed out that they may prefer having two separate keybinds for connect and disconnect. To accommodate both user groups, there are now three actions - toggle, connect, and disconnect. The user can choose which to bind in order to suit their preference!

[unix-system]

@boatbomber Mostly a preference thing. For better or worse, I don't really use keybinds often in Studio. So assuming that's true for other users too, this would reduce the number of clicks required for me to start or stop Rojo.

(relevant)

[LPGhatguy]

Great PR, a couple comments and then we should be good to go!

[LPGhatguy]

LGTM! Thank you!