Add is case insensitive equal to for Text types

Change-type: minor

Type.sbvr

@@ -94,6 +94,9 @@ Fact type:  Text1 is equal to Text2
 	Synonymous Form: Text1 equals Text2
 	Synonymous Form: Text2 equals Text1
 
+Fact type:  Text1 is case insensitive equal to Text2
+	Synonymous Form: Text2 is case insensitive equal to Text1
+
 Fact type:  Text1 starts with Text2
 
 Fact type:  Text1 ends with Text2

src/types/text.ts

@@ -3,6 +3,7 @@ import type {
 	StartsWithNode,
 	EndsWithNode,
 	ContainsNode,
+	EqualsNode,
 } from '@balena/abstract-sql-compiler';
 import * as TypeUtils from '../type-utils';
 
@@ -27,6 +28,11 @@ export const nativeProperties: TypeUtils.NativeProperties = {
 export const nativeFactTypes: TypeUtils.NativeFactTypes = {
 	Text: {
 		...TypeUtils.nativeFactTypeTemplates.equality,
+		'is case insensitive equal to': (from, to): EqualsNode => [
+			'Equals',
+			['ToLower', from],
+			['ToLower', to],
+		],
 		'starts with': (from, to): StartsWithNode => ['StartsWith', from, to],
 		'ends with': (from, to): EndsWithNode => ['EndsWith', from, to],
 		contains: (from, to): ContainsNode => ['Contains', from, to],