chore(docs): add more comparison examples (vectordotdev#18333)

* chore(docs): add more comparison examples

* mention match function

* remove one test case because it doesn't compile

website/cue/reference/remap/expressions/comparison.cue

@@ -1,10 +1,10 @@
 package metadata
 
 remap: expressions: comparison: {
-	title: "Comparison"
+	title:       "Comparison"
 	description: """
 		A _comparison_ expression compares two expressions (operands) and produces a Boolean as defined by the
-		operator.
+		operator. Please refer to the [match function](\(urls.vrl_match_function)) for matching a string against a regex.
 		"""
 	return: """
 		Returns a Boolean as defined by the operator.
@@ -39,19 +39,41 @@ remap: expressions: comparison: {
 
 	examples: [
 		{
-			title: "Equal"
+			title: "Equal integers"
 			source: #"""
 				1 == 1
 				"""#
 			return: true
 		},
+		{
+			title: "Equal integer and float"
+			source: #"""
+				1 == 1.0
+				"""#
+			return: true
+		},
 		{
 			title: "Not equal"
 			source: #"""
 				1 != 2
 				"""#
 			return: true
 		},
+		{
+			title: "Equal string"
+			source: #"""
+				x = "foo"
+				x == "foo"
+				"""#
+			return: true
+		},
+		{
+			title: "Not equal strings"
+			source: #"""
+				"foo" != "bar"
+				"""#
+			return: true
+		},
 		{
 			title: "Greater than or equal"
 			source: #"""

website/cue/reference/remap/functions/match.cue

@@ -31,5 +31,12 @@ remap: functions: match: {
 				"""
 			return: true
 		},
+		{
+			title: "String does not match the regular expression"
+			source: """
+				match("I'm a little teapot", r'.*balloon')
+				"""
+			return: false
+		},
 	]
 }

website/cue/reference/urls.cue

@@ -635,6 +635,7 @@ urls: {
 	vrl_features:                               "\(vrl_reference)/#features"
 	vrl_functions:                              "\(vrl_reference)/functions"
 	vrl_literals:                               "\(vrl_expressions)/#literal-expressions"
+	vrl_match_function:                         "\(vrl_functions)/#match"
 	vrl_parsing_functions:                      "\(vrl_functions)/#parse-functions"
 	vrl_path_expressions:                       "\(vrl_expressions)#path"
 	vrl_performance:                            "\(vrl_reference)#performance"