Add config to use key value on options, layout tweaks

[andreia]

Details

• Add options_editor config (tags default or key_value) with per-type map and Closure support so keyed option maps display correctly in the Fields relation manager
• Rework the create/edit field form layout: type, order and required share the first row, while label, options and hint each get a full-width row
• Build only the options editor matching the field type, so keyed option maps keep their stored keys instead of being flattened by the other editor's hydration
• Name the dynamic tenant relationship explicitly, fixing Call to undefined relationship [{closure...] when refreshing or eager loading a model whose tenant was associated by Filament
• Truncate long Labels on the Fields table to 60 characters and show the full text in a tooltip when truncated