Add penis length and circumcision stats to performers. (#3627)

* Add penis length stat to performers.
* Modified the UI to display and edit the stat.
* Added the ability to filter floats to allow filtering by penis length.
* Add circumcision stat to performer.
* Refactor enum filtering
* Change boolean filter to radio buttons
* Return null for empty enum values
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Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

pkg/sqlite/values.go

@@ -24,6 +24,15 @@ func nullIntPtr(i null.Int) *int {
 	return &v
 }
 
+func nullFloatPtr(i null.Float) *float64 {
+	if !i.Valid {
+		return nil
+	}
+
+	v := float64(i.Float64)
+	return &v
+}
+
 func nullIntFolderIDPtr(i null.Int) *file.FolderID {
 	if !i.Valid {
 		return nil