feat(weather): add Buienradar provider

[KristjanESPERANTO]

This adds the weather provider Buienradar for the Netherlands and Belgium without requiring an API key.

In MagicMirrorOrg/MagicMirror-Documentation#380 @plebcity shared his implementation for the old browser-side architecture. I used it as a reference to build this server-side implementation.

Example screenshot

Example config

		{
			module: "weather",
			position: "top_left",
			header: "Buienradar - Current",
			config: {
				weatherProvider: "buienradar",
				type: "current",
				locationId: 2747891
			}
		},
		{
			module: "weather",
			position: "top_right",
			header: "Buienradar - Forecast",
			config: {
				weatherProvider: "buienradar",
				type: "forecast",
				locationId: 2747891
			}
		},
		{
			module: "weather",
			position: "bottom_left",
			header: "Buienradar - Hourly",
			config: {
				weatherProvider: "buienradar",
				type: "hourly",
				locationId: 2747891
			}
		},

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When this is accepted and merged I'll update the weather docs.