Wrong directory for base.schema.json

[whi-tw]

It looks like the relative directory used to access base.schema.json is incorrect:

ENOENT: no such file or directory, open '/Users/$USER/.vscode/extensions/schema/base.schema.json'

cfn-lint-visual-studio-code/server/src/cfnServerInit.ts

Lines 92 to 106 in ceba900

	readFile(
	path.join(__dirname, `../../../schema/base.schema.json`),
	"utf8",
	(err, data) => {
	if (err) {
	this.connection.console.log(err.message);
	}
	let schema: JSONSchema;
	schema = data as JSONSchema;
	this.languageService.addSchema(
	"https://aws.amazon.com/cloudformation/template/base",
	schema
	);
	}
	);

I'm assuming the assumption is __dirname will be the source directory, but in reality, it's ${extensionRoot}/server/out, so the relative path should be ../schema/base.schema.json

I think this is also the case for other relative paths, but I haven't got that far in testing yet