Migrate deprecated Google Maps autocomplete widget

[theimpostor]

Summary

• replace the deprecated google.maps.places.Autocomplete widget with google.maps.places.PlaceAutocompleteElement
• keep the existing location lookup flow by fetching displayName, formattedAddress, and location from the selected place, with geocoder fallback for manual text searches
• restyle the new widget to fit the existing Bootstrap layout and mirror the app's disabled/loading state

Validation

• npm run build
• loaded the local app and confirmed the new Place Autocomplete element renders as the search control
• local Google-backed request validation is limited because the site API key denies Places requests on http://localhost:5000, so autocomplete calls return the widget's backend error there even though the live domain is authorized

[github-actions]

Visit the preview URL for this PR (updated for commit 3d76532):

https://praytime-b76cb--pr17-fix-place-autocomple-r43cyfsz.web.app

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