config:schema:foobar.views.filter.yml

# Schema for the views plugins.

views.filter.project_size_range_select:
  type: views_filter
  label: 'Foobar numeric'

views.filter_value.project_size_range_select:
  type: views.filter_value.numeric
  label: 'Foobar Numeric'

foobar.views.inc

<?php

/**
 * Implements hook_views_data_alter().
 */
function foobar_views_data_alter(array &$data) {

  // Clone an existing "numeric" field
  $data['node__field_a']['field_a_value_range'] = $data['node__a']['field_a_value'];
  
  // Change the title (otherwise it's indistinguishable in the UI
  $data['node__field_a']['field_a_value_range']['title'] = t("Foobar");
  // Set the correct filter ID for this field.
  $data['node__field_a']['field_a_value_range']['filter']['id'] = 'project_size_range_select';  
  // Remove unused plugins for the cloned field.
  unset($data['node__field_a']['field_a_value_range']['field']);
  unset($data['node__field_a']['field_a_value_range']['argument']);

  return $data;
}

src:Plugin:views:filter:FoobarProjectSizeRangeSelectionFilter.php

<?php

namespace Drupal\foobar\Plugin\views\filter;

use Drupal\views\Plugin\views\filter\NumericFilter;

/**
 * Class DateYearFilter
 *
 * @ingroup views_filter_handlers
 *
 * @ViewsFilter("project_size_range_select")
 */
class FoobarProjectSizeRangeSelectionFilter extends NumericFilter {

}

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