feat: Workspace filters case insensitive (#2646)

coderd/util/slice/slice.go

@@ -1,20 +1,32 @@
 package slice
 
-func Contains[T comparable](haystack []T, needle T) bool {
+func ContainsCompare[T any](haystack []T, needle T, equal func(a, b T) bool) bool {
 	for _, hay := range haystack {
-		if needle == hay {
+		if equal(needle, hay) {
 			return true
 		}
 	}
 	return false
 }
 
+func Contains[T comparable](haystack []T, needle T) bool {
+	return ContainsCompare(haystack, needle, func(a, b T) bool {
+		return a == b
+	})
+}
+
 // Overlap returns if the 2 sets have any overlap (element(s) in common)
 func Overlap[T comparable](a []T, b []T) bool {
+	return OverlapCompare(a, b, func(a, b T) bool {
+		return a == b
+	})
+}
+
+func OverlapCompare[T any](a []T, b []T, equal func(a, b T) bool) bool {
 	// For each element in b, if at least 1 is contained in 'a',
 	// return true.
 	for _, element := range b {
-		if Contains(a, element) {
+		if ContainsCompare(a, element, equal) {
 			return true
 		}
 	}