Setup CI/CD Pipeline for Flutter app using CircleCI

[sweep-ai[bot]]

Description

This PR sets up a CI/CD pipeline for the weather insights Flutter app using CircleCI. The pipeline is configured to build the application for both iOS and Android platforms.

Summary

• Added a CircleCI configuration file (config.yml) in the .circleci directory at the root of the project.
• Defined the steps in the config.yml file to install Flutter and build the application for both iOS and Android.
• Created a build job in the config.yml file that checks out the code, installs Flutter, and builds the application for both platforms.
• Configured the workflows section in the config.yml file to run the build job for all branches.

Please review and merge this PR to enable automated building and testing of the weather insights Flutter app using CircleCI.

Fixes #1.

---

To checkout this PR branch, run the following command in your terminal:

git checkout {pull_request.branch_name}

---

🎉 Latest improvements to Sweep:

• Use Sweep Map to break large issues into smaller sub-issues, perfect for large tasks like "Sweep (map): migrate from React class components to function components"
• Getting Sweep to format before committing! Check out Sweep Sandbox Configs to set it up.
• We released a demo of our chunker, where you can find the corresponding blog and code.

---

💡 To get Sweep to edit this pull request, you can:

• Leave a comment below to get Sweep to edit the entire PR
• Leave a comment in the code will only modify the file
• Edit the original issue to get Sweep to recreate the PR from scratch