feat(package/prettify-log): colored output for log keywords

package/prettify-log/test/fixture/expected-colored.log

@@ -0,0 +1,87 @@
+Debug: respons {
+  "some": "name",
+  "value": 12
+} is received
+{timespan} Info: some log without json
+Error: {
+  "code": 500,
+  "error": "Something went wrong"
+}
+Warning: Invalid data format detected
+{
+  "data": {
+    "id": 1,
+    "name": "test"
+  },
+  "status": "ok"
+}
+User log: {
+  "action": "login",
+  "timestamp": "2025-01-31T12:00:00Z",
+  "user": "john_doe"
+}
+Random text without json
+Debug: Payload sent: {
+  "request": {
+    "body": {
+      "key": "value"
+    },
+    "type": "POST"
+  }
+}
+Another line with no json
+{meta} Log: {"action": "update", "success": true}
+Normal message with {
+  "json": "inside"
+} text
+{
+  "array": [
+    1,
+    2,
+    3
+  ],
+  "nested": {
+    "deep": {
+      "value": "found"
+    }
+  }
+}
+{2025-01-31} Event: {"event": "created", "user": "admin"}
+Plain text that should not be modified
+Info: {
+  "details": "this is a test log",
+  "level": "info"
+}
+{
+  "array": [
+    {
+      "id": 1
+    },
+    {
+      "id": 2
+    },
+    {
+      "id": 3
+    }
+  ]
+}
+An unformatted json log {
+  "name": "example",
+  "valid": true
+}
+Debug: {
+  "data": "test",
+  "items": [
+    {
+      "x": 10,
+      "y": 20
+    }
+  ]
+}
+Non-json message with curly braces {like this}
+{
+  "key1": "value1",
+  "key2": {
+    "subkey": "subvalue"
+  }
+}

package/prettify-log/test/prettify.rs

@@ -34,3 +34,35 @@ fn test_prettify() {
         );
     }
 }
+
+#[test]
+fn test_prettify_colored() {
+    let input_file = "test/fixture/test.log";
+    let expected_output = fs::read_to_string("test/fixture/expected-colored.log")
+        .expect("Failed to read expected.log");
+
+    let mut actual_output_file = NamedTempFile::new().expect("Failed to create temp file");
+
+    let output = Command::new("cargo")
+        .args(&["run", "--quiet", "--", "--color-output"])
+        .stdin(fs::File::open(input_file).expect("Failed to open test.log"))
+        .output()
+        .expect("Failed to run prettify_logs");
+
+    assert!(output.status.success());
+
+    actual_output_file
+        .write_all(&output.stdout)
+        .expect("Failed to write output");
+
+    let actual_output = String::from_utf8_lossy(&output.stdout);
+
+    assert_eq!(actual_output.trim(), expected_output.trim(), "Output does not match expected.log");
+
+    if actual_output.trim() != expected_output.trim() {
+        eprintln!(
+            "Test failed! Actual output saved to: {}",
+            actual_output_file.path().display()
+        );
+    }
+}