fixbug: fix devcontainer context

[cyx-6]

📌 Description

This PR fixes the dev container after #1880.

🔍 Related Issues

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Reviewer Notes

[gemini-code-assist]

Summary of Changes

Hello @cyx-6, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a bug related to the development container configuration that arose after a previous change. It specifically fixes the Docker build context for several CUDA-enabled dev containers, ensuring they can be built and initialized correctly by pointing the build process to the appropriate root directory of the repository.

Highlights

• Dev Container Context Fix: The Docker build context path has been corrected in all CUDA-specific devcontainer.json files (cu126, cu128, cu129, cu130). Previously, the context was set to ../../docker/, which has been updated to ../../.
• Improved Build Reliability: This change ensures that the Docker build process for these development containers correctly accesses all necessary files from the repository's root directory, resolving potential issues with dev container setup and functionality.

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[gemini-code-assist]

Code Review

This pull request correctly fixes a bug in the dev container configuration by adjusting the Docker build context. The changes in the devcontainer.json files for various CUDA versions update the context path to the repository root. This aligns with the COPY instructions within the Dockerfiles, which reference files from the root level, such as requirements.txt. The previous context pointed to a subdirectory, causing build failures. This change is accurate and necessary to restore the dev container functionality.