Terminal Suggestion: Show folder in PATH executable completions

[Tyriar]

This will be very useful in general, but a particularly good case is identifying the python very being used (after/before py env activation):

cc @meganrogge

[Tyriar]

Actually this is blocked on turning a richer type here:

vscode/extensions/terminal-suggest/src/terminalSuggestMain.ts

Lines 83 to 84 in e8184ed

	const commandsInPath = await getCommandsInPath();
	const builtinCommands = getBuiltinCommands(shellPath);

We pass these Set<string> into getCompletionItemsFromSpecs but we want something more like Set<Partial<CompletionItem> | string> with a required label. This was also a problem when trying to pass back descriptions for commands from Get-Command here:

vscode/extensions/terminal-suggest/src/terminalSuggestMain.ts

Lines 46 to 58 in e8184ed

	case 'pwsh': {
	// TODO: Select `CommandType, DisplayName` and map to a rich type with kind and detail
	const output = execSync('Get-Command -All | Select-Object Name | ConvertTo-Json', options);
	let json: any;
	try {
	json = JSON.parse(output);
	} catch (e) {
	console.error('Error parsing pwsh output:', e);
	return [];
	}
	commands = (json as any[]).map(e => e.Name);
	break;
	}