Add MapClick adapter and "fallback" logic when observations are stale

- Create utils/mapclick.mjs with centralized MapClick API functionality
- Refactor modules to use the new utility:
  - Current Weather
  - Latest Observations
  - Regional Forecast
- Add staleness checking utility for use by modules

server/scripts/modules/autocomplete.mjs

@@ -297,6 +297,9 @@ class AutoComplete {
 	// if a click is detected on the page, generally we hide the suggestions, unless the click was within the autocomplete elements
 	checkOutsideClick(e) {
 		if (e.target.id === 'txtLocation') return;
+		// Fix autocomplete crash on outside click detection
+		// Add optional chaining to prevent TypeError when checking classList.contains()
+		// on elements that may not have a classList property.
 		if (e.target?.parentNode?.classList?.contains(this.options.containerClass)) return;
 		this.hideSuggestions();
 	}