docs(vrl): add crc vrl function docs

website/cue/reference/remap/functions.cue

@@ -28,7 +28,7 @@ remap: {
 		pure:       bool | *true
 	}
 
-	#FunctionCategory: "Array" | "Codec" | "Coerce" | "Convert" | "Debug" | "Enrichment" | "Enumerate" | "Event" | "Path" | "Cryptography" | "IP" | "Number" | "Object" | "Parse" | "Random" | "String" | "System" | "Timestamp" | "Type"
+	#FunctionCategory: "Array" | "Codec" | "Coerce" | "Convert" | "Debug" | "Enrichment" | "Enumerate" | "Event" | "Path" | "Cryptography" | "IP" | "Number" | "Object" | "Parse" | "Random" | "String" | "System" | "Timestamp" | "Type" | "Checksum"
 
 	// A helper array for generating docs. At some point, we should generate this from the
 	// #FunctionCategory enum if CUE adds support for that.
@@ -52,6 +52,7 @@ remap: {
 		"System",
 		"Timestamp",
 		"Type",
+		"Checksum",
 	]
 
 	functions: [Name=string]: #Function & {

website/cue/reference/remap/functions/crc32.cue

@@ -0,0 +1,29 @@
+package metadata
+
+remap: functions: crc32: {
+	category: "Checksum"
+	description: """
+		Calculates a CRC32 of the string,`value`.
+		"""
+
+	arguments: [
+		{
+			name:        "value"
+			description: "The string to calculate the checksum for."
+			required:    true
+			type: ["string"]
+		},
+	]
+	internal_failure_reasons: []
+	return: types: ["string"]
+
+	examples: [
+		{
+			title: "Create CRC32 checksum"
+			source: #"""
+				crc32("foo")
+				"""#
+			return: "8c736521"
+		},
+	]
+}