Add inference test for built package

[toniher]

This pull request adds a new end-to-end smoke test workflow for GGUF model inference, ensuring that the conda-built package can load, tokenize, run inference, and (optionally) generate embeddings using a small test model. The workflow builds the package, installs it in a fresh environment, downloads a sample GGUF model, and runs a new Python test script to verify core functionality.

New CI workflow for GGUF inference testing:

• Added .github/workflows/test-gguf.yml to define a GitHub Actions workflow that builds the conda package, installs it in a clean environment, downloads a small GGUF model, and runs an end-to-end test to verify package and model functionality.

Test script for GGUF model validation:

• Introduced test_gguf.py, a Python script that checks the ability to import the package, load a GGUF model, perform tokenization, run inference, and (optionally) generate embeddings, exiting with an error if any step fails.

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Support tools used: Claude Code Opus 4.8, GitHub Copilot

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Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-webservice.

It appears you are making a pull request from a branch in your feedstock and not a fork. This procedure will generate a separate build for each push to the branch and is thus not allowed. See our documentation for more details.

Please close this pull request and remake it from a fork of this feedstock.

Have a great day!

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-webservice.

It appears you are making a pull request from a branch in your feedstock and not a fork. This procedure will generate a separate build for each push to the branch and is thus not allowed. See our documentation for more details.

Please close this pull request and remake it from a fork of this feedstock.

Have a great day!

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipe/meta.yaml) and found some lint.

Here's what I've got...

For recipe/meta.yaml:

• ❌ conda-forge feedstocks cannot have custom Github Actions workflows. See Custom Github Actions workflows are disallowed conda-forge.github.io#2750 for more information. If you didn't add any custom workflows, please consider rerendering your feedstock to remove deprecated workflows.

_{This message was generated by GitHub Actions workflow run https://github.com/conda-forge/conda-forge-webservices/actions/runs/27683570316. Examine the logs at this URL for more detail.}

[jjerphan]

FYI, pull requests have to be made from forks, not from branches upstream like here otherwise builds are published on conda-forge.