Opening files in _ascii_ encoding

[h8nor]

Added ability to manage the editor's settings extension https://code.visualstudio.com/updates/v1_63#_configuration-defaults-overrides
I would like to open the files *.bas in the encoding of ascii (required condition for import modules).

	"contributes": {
		
		"configuration": {
			"title": "VBA",
			"type": "object",
			"properties": {
				"vscodeVBA.Charset": {
					"type": "string",
					"enum": [
						"windows1250",
						"windows1251",
						"windows1252",
						"windows1253",
						"windows1254",
						"windows1255",
						"windows1256",
						"windows1257",
						"windows1258"
					],
					"description": "Default charset vba file",
					"default": "windows1250"
				}
			}
		},
		"configurationDefaults": {
			"[cls][frm][vba]": {
				"editor.rulers": [
					{
						"column": 80,
						"color": "#ff0000"
					}
				],
				"files.encoding": "${vscode.workspace.getConfiguration('vscodeVBA').get('Charset') as 'windows1250' || 'windows1251' || 'windows1252' || 'windows1253' || 'windows1254' || 'windows1255' || 'windows1256' || 'windows1257' || 'windows1258';}"
			}
		},
		
        }

It is impossible to apply directly object and properties, so debugger requires value from enums for vscodeVBA.Charset. It was assumed that user itself would configure ascii code page that meets its language.

Also added the boundaries of characters on a string (ruler) that work in the setting.

Unfortunately, I do not have enough knowledge to compile src. Maybe you will have opportunity to realize the idea.

[serkonda7]

Really good idea. This should reduce possible encoding incompatibilities with Office's VBA Editor.

At the moment, I have limited time so this might take a while for me but I could add instructions on how to work on the extension some time soon.

[h8nor]

@serkonda7 it'll be generously on your part. I'm interested in contribution of this useful extension.

[h8nor]

Non obvious problem in the vscode when comparing commits. We must use an additional setting for our formats.

https://code.visualstudio.com/updates/v1_48#_browser-support