Add rating filter/sort + fix isEmpty/isNotEmpty + fix combinedViewFilters

[Weiko]

Context

• Adding RATING sort and filter capabilities.
• Fixing isEmpty/isNotEmpty filters
• Fixing combined view filters so it combines filters per field metadata and not per filter id. This is more a product question but to me it does not make sense to apply multiples filters on the same field IF the operations is wrapped in a AND. If at some point we want to put a OR instead then that would make more sense

[greptile-apps]

PR Summary

• Added support for 'RATING' filter and sort capabilities (formatFieldMetadataItemsAsFilterDefinitions.ts, formatFieldMetadataItemsAsSortDefinitions.ts, FilterType.ts, getOperandsForFilterType.ts, isRecordMatchingFilter.ts, turnObjectDropdownFilterIntoQueryFilter.ts)
• Introduced ObjectFilterDropdownRatingInput.tsx component for rating filter input
• Fixed handling of isEmpty and isNotEmpty operands (MultipleFiltersDropdownContent.tsx, EditableFilterDropdownButton.tsx)
• Updated combined view filters logic to use fieldMetadataId instead of id (useCombinedViewFilters.ts, useSaveCurrentViewFiltersAndSorts.ts, combinedViewFilters.ts)

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