This PR adds support for automatically tagging extensions that provide language models with the language-models tag, making them easier to discover and filter in the marketplace.

Changes Made

• Detection Logic: Added detection for languageModels contribution point in TagsProcessor
• Tag Addition: Extensions with languageModels contribution now automatically receive the language-models tag
• Test Coverage: Added comprehensive test case following the existing pattern

Implementation Details

The implementation follows the exact same pattern as other contribution point tags like languageModelTools, chatParticipants, etc.:

const languageModels = doesContribute('languageModels') ? ['language-models'] : [];

Extensions that declare languageModels in their package.json contributes section will now automatically receive the language-models tag when published to the marketplace.

Example

An extension with this package.json:

{
  "contributes": {
    "languageModels": [
      {
        "name": "My Language Model",
        "id": "my-model"
      }
    ]
  }
}

Will now automatically receive the language-models tag, making it discoverable alongside other language model extensions.

Fixes #1165.

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