Heads up: latest alpha generates error on editor gaining focus

[zersiax]

It seems this addon may need some slight updates to work with the upcoming 2021.1 version that is an addon API-breaking release.
Currently when landing in the editor, either by alt+tabbing in or accepting an autocomplete suggestion, the following error is thrown:

ERROR - eventHandler.executeEvent (20:58:34.947) - MainThread (30972):
error executing event: gainFocus on <NVDAObjects.Dynamic_EditableTextExCodeEditorEditableTextWithAutoSelectDetectionEditorIa2WebIAccessible object at 0x0708BED0> with extra args of {}
Traceback (most recent call last):
File "eventHandler.pyc", line 246, in executeEvent
File "eventHandler.pyc", line 96, in init
File "eventHandler.pyc", line 105, in next
File "C:\Users\flori\AppData\Roaming\nvda\addons\NVDAExtensionGlobalPlugin\globalPlugins\NVDAExtensionGlobalPlugin\theGlobalPlugin.py", line 664, in event_gainFocus
nextHandler()
File "eventHandler.pyc", line 105, in next
File "C:\Users\flori\AppData\Roaming\nvda\addons\remote\globalPlugins\remoteClient_init_.py", line 426, in event_gainFocus
nextHandler()
File "eventHandler.pyc", line 105, in next
File "C:\Users\flori\AppData\Roaming\nvda\addons\BrailleExtender\globalPlugins\brailleExtender_init_.py", line 186, in event_gainFocus
nextHandler()
File "eventHandler.pyc", line 105, in next
File "C:\Users\flori\AppData\Roaming\nvda\addons\nvda-for-vs-code\appModules\visualstudiocode.py", line 71, in event_gainFocus
self.processLine()
File "C:\Users\flori\AppData\Roaming\nvda\addons\nvda-for-vs-code\appModules\visualstudiocode.py", line 107, in processLine
reason=cTs.REASON_MESSAGE, suppressBlanks=True)
AttributeError: module 'controlTypes' has no attribute 'REASON_MESSAGE'

Likely has to do with this change:
nvaccess/nvda#11969

Please note that various other controlTypes calls have been slightly altered as well, see the current alpha's changelog.

[pawelurbanski]

I updated the constants. In addition to that, I have also cleaned the code in a few places.
What used to be a single Python file is now split into smaller modules. I will keep on working on this module as much as other projects will let me to do so.
Once I spend a day or 2 working using the current version, I will upload it to Github releaes page.
I generally tend to check compatibility and provide possible fixes in case any errors pop up once the next NVDA version is released. This is a side project, which I do want to spend my time on, for I use Visual Studio Code alot, but tend to focus on changes which result from confirmed changes in NVDA itself.