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/utils/strings.go

@@ -31,3 +31,13 @@ func StrFormat(format string, m StrFormatMap) string {
 
 	return strings.NewReplacer(args...).Replace(format)
 }
+
+// StringerSliceToStringSlice converts a slice of fmt.Stringers to a slice of strings.
+func StringerSliceToStringSlice[V fmt.Stringer](v []V) []string {
+	ret := make([]string, len(v))
+	for i, vv := range v {
+		ret[i] = vv.String()
+	}
+
+	return ret
+}