Connections: Create SQLite connection

[dfalbel]

Addresses #6185
Additionaly, add support for checking and installing package dependencies when they are not installed.

Release Notes

New Features

• N/A

Bug Fixes

• N/A

QA Notes

Try creating a new SQLite connection with both R and Python. Make sure the generated code executes correctly.
Possibly try running in an R environment where packages are not available, so you can test the installation steps.

@:connections

[github-actions]

E2E Tests 🚀
This PR will run tests tagged with: @:critical @:connections

^{readme  valid tags}

[jmcphers]

This needs some exception handling; if callMethod throws I think the exception should be logged (and we should probably presume the dependencies to be installed since otherwise the user will be blocked as I understand it?)

[dfalbel]

In theory this is handled on the call site of checkDependencies and installDependencies:

positron/src/vs/workbench/contrib/positronConnections/browser/components/newConnectionModalDialog/createConnectionState.tsx

Lines 66 to 83 in 2122937

	try {
	if (!props.selectedDriver.connect) {
	throw new Error(
	localize('positron.newConnectionModalDialog.createConnection.connectNotImplemented', "Connect method not implemented")
	);
	}
	if (props.selectedDriver.checkDependencies && props.selectedDriver.installDependencies) {
	const dependenciesInstalled = await props.selectedDriver.checkDependencies();
	if (!dependenciesInstalled) {
	await props.selectedDriver.installDependencies();
	}
	}
	await props.selectedDriver.connect(code);
	} catch (err) {
	services.notificationService.error(err);
	}

But indeed, they wouldn't be able to run connect() if checking for the dependencies fails.

[dfalbel]

With 2bfb463 we now presume that upon failure to check if dependencies are installed we can continue and try to connect.

[jmcphers]

As above, need exception handling here

[jmcphers]

Working for me!

Nit: remove space in connections:: connection_view(con)?