Support file browsing in Geo reader and writer nodes

[koettert]

One can only type in a hard-coded path, but browsing the file to read or eve just the destination (for writer nodes) would improve the user experience.

Solution
Allow the user to choose from a local file or a Custom URL as input. The default value for new nodes would be local file browsing whereas for existing node it would be custom URL. Use the new classknime.extension.LocalPathParameter to let the user browse for a local file.

[koettert]

Starting with KNIME 5.3 we can use the LocalPathParameter (AP-21517) to let users browse for local files in the Geospatial file nodes.

[UrbanGISer]

set a validator = none to accept both type url: local file and online url

[UrbanGISer]

create PR for review