add a task dump in registry for better documentation of tasks

[NathanHB]

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[HuggingFaceDocBuilderDev]

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[Copilot]

Pull Request Overview

This PR adds a task dump functionality to the registry that exports all task names, metadata, and docstrings as JSON for better documentation. The changes also reduce the number of Global MMLU task variations.

• Adds get_tasks_dump() method to the Registry class to serialize task configurations and metadata
• Adds a new dump CLI command to output task information as JSON
• Reduces Global MMLU task variations by removing CF and Hybrid formulations and limiting to "ALL" sensitivity label

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/lighteval/tasks/registry.py	Adds instance variables to store initialization parameters and implements get_tasks_dump() method with docstring parsing and value serialization logic
src/lighteval/tasks/multilingual/tasks/global_mmlu.py	Removes unused imports (CFFormulation, HybridFormulation) and reduces task variations
src/lighteval/main_tasks.py	Adds new dump CLI command that uses the registry's task dump functionality to output JSON

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[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

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