Add Dev Container support that installs Python 3.11, Java 11.0.25-sem, Maven, LLVM (for C), and Rust.

[rofrano]

Motivation and Context

Having developers manually creating local development environments to work in is: time consuming, error prone, inconsistent at best, and unreproducible at worst! This PR adds a VSCode Dev Container environment to the repo so that developers do not need to install all of the prerequisites. They only need Visual Studio Code with the Dev Container extensions, and either Docker Desktop or Rancher Desktop to get started.

How Has This Been Tested?

It was testing with these commands:

git clone https://github.com/codellm-devkit/python-sdk.git
cd python-sdk
code .

Then press Reopen in Container and a development environment was created.

Breaking Changes

This does not affect the code so there are no breaking changes.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the Codellm-Devkit Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context