fix: doc and comment

Signed-off-by: bkioshn <[email protected]>

docs/src/guides/languages/flutter.md

@@ -157,6 +157,39 @@ please follow this [guide](./../../onboarding/index.md).
 It is pretty strait forward for this builder process,
 because as a part of `+build` target we already creating a docker image.
 
+## Enhancing Flutter
+
+### Integrating Flutter with Rust using `flutter_rust_bridge`
+
+The `flutter_rust_bridge` allows you to integrate Rust with Flutter app, while maintaining the rest of the app in
+Dart.
+This can be useful for situations where you need to run complex algorithms, handle data
+processing, or interact with low-level system APIs, but still want to leverage the Flutter ecosystem
+for UI and app management.
+
+Start by creating a new builder where all the necessary setup is done under the `flutter_rust_bridge+builder`,
+then copy the Flutter project that already have `flutter_rust_bridge` setup.
+Refer to <https://cjycode.com/flutter_rust_bridge/> for how to setup the project.
+
+```Earthfile
+builder-frb:
+    FROM flutter_rust_bridge+builder
+    COPY . .
+```
+
+Then generate a binding between Rust and Flutter
+
+```Earthfile
+# Generated necessary files for running Flutter web locally and save it locally.
+code-generator-web:
+    FROM +builder-frb
+    DO flutter_rust_bridge+CODE_GENERATOR_WEB
+
+    SAVE ARTIFACT ./web/pkg AS LOCAL ./example/web/pkg
+    SAVE ARTIFACT ./rust/src/frb_generated.rs AS LOCAL ./rust/src/frb_generated.rs
+    SAVE ARTIFACT ./lib/src AS LOCAL ./lib/src
+```
+
 ## Conclusion
 
 You can see the final `Earthfile`

earthly/flutter_rust_bridge/Earthfile

@@ -5,6 +5,7 @@ IMPORT ../rust AS rust-ci
 
 # This will be refactored in the future
 # TODO(bkioshn): https://github.com/input-output-hk/catalyst-ci/issues/322
+# builder: Setup necessary tools for `flutter_rust_bridge`
 builder:
     FROM debian:stable-slim
 

examples/flutter/example/Earthfile

@@ -1,6 +1,7 @@
 VERSION 0.8
 
 IMPORT ../../../earthly/flutter AS flutter-ci
+IMPORT ../../../earthly/flutter_rust_bridge AS flutter_rust_bridge
 
 # To see more available functions, navigate to earthly/flutter/Earthfile.
 
@@ -39,3 +40,18 @@ build-web:
     ARG --required SENTRY_DSN
 
     DO flutter-ci+BUILD_WEB --WORKDIR=$WORKDIR --TARGET=$TARGET --SENTRY_DSN=$SENTRY_DSN
+
+# -----------------flutter_rust_bridge-----------------
+
+builder-frb:
+    FROM flutter_rust_bridge+builder
+    COPY . .
+
+# Generated necessary files for running Flutter web locally and save it locally.
+code-generator-web:
+    FROM +builder-frb
+    DO flutter_rust_bridge+CODE_GENERATOR_WEB
+
+    SAVE ARTIFACT ./web/pkg AS LOCAL ./example/web/pkg
+    SAVE ARTIFACT ./rust/src/frb_generated.rs AS LOCAL ./rust/src/frb_generated.rs
+    SAVE ARTIFACT ./lib/src AS LOCAL ./lib/src

examples/flutter/example/rust_builder/README.md

@@ -1 +1,2 @@
-Please ignore this folder, which is just glue to build Rust with Flutter.
+<!-- markdownlint-disable -->
+Please ignore this folder, which is just glue to build Rust with Flutter.

examples/flutter/example/rust_builder/cargokit/build_tool/README.md

@@ -1,5 +1,6 @@
+<!-- markdownlint-disable -->
 /// This is copied from Cargokit (which is the official way to use it currently)
-/// Details: https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin
+/// Details: <https://fzyzcjy.github.io/flutter_rust_bridge/manual/integrate/builtin>
 
 A sample command-line application with an entrypoint in `bin/`, library code
 in `lib/`, and example unit test in `test/`.