chore: configure and build Dev Container for flutter development

[ZauberNerd]

This commit adds a Dev Container configuration to allow building and testing the Android Flutter application without additional setup on the host.
It also presents a method of using the Dev Container in a cloud workspace (GitHub Codespaces) while still being able to push the builds to a connected Android device.

Summary by Sourcery

Build:

• Add a Dev Container configuration with necessary dependencies and tools for Flutter and Android development.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces a Dev Container configuration for building and testing the Android Flutter application, simplifying the development setup and enabling usage in cloud workspaces like GitHub Codespaces. It also includes instructions for connecting to Android devices via ADB for debugging and running the application.

Sequence diagram for Dev Container setup and device connection

sequenceDiagram
    participant Dev as Developer
    participant DC as Dev Container
    participant ADB as ADB Server
    participant AD as Android Device

    Dev->>DC: Open repository in VS Code
    DC->>DC: Initialize container
    DC->>DC: Install Flutter SDK
    DC->>DC: Install Android SDK

    alt USB Pass-through
        Dev->>AD: Connect via USB
        DC->>AD: Detect device via ADB
    else Host ADB Server
        Dev->>ADB: Start ADB server on all interfaces
        DC->>ADB: Connect to host ADB (tcp:5037)
        ADB->>AD: Connect to device
    else Wireless Connection
        Dev->>AD: Enable wireless debugging
        DC->>AD: Pair device (adb pair)
        DC->>AD: Connect to device (adb connect)
    end

    DC->>AD: Deploy Flutter app

Loading

File-Level Changes

Change	Details	Files
Added Dev Container configuration files.	Created a Dockerfile to define the Dev Container environment, including installing necessary dependencies like Flutter SDK, Android SDK, and build tools. Created a devcontainer.json file to configure the Dev Container settings and extensions in VSCode and other supported IDEs.	.devcontainer/Dockerfile .devcontainer/devcontainer.json
Updated the README file with Dev Container usage instructions.	Added a new section to the README explaining how to use the Dev Container. Provided instructions for connecting to Android devices via ADB using various methods like USB pass-through, host ADB server, and wireless debugging. Included details on how to set up ADB for different operating systems and network configurations.	README.md

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[adityastic]

Would make development really convenient! Thanks for looking after dev xp