bug: Markdownlint Action Ignore Templates

[EmersonFras]

Summary

The markdown lint action was not ignoring files listed in the markdownlintignore. To ensure the linter ignores these files we must clearly define them in the linters yaml file by including what files to ignore.

Testing

Below was tested with an added file docs/wiki-guides/HF_test_Template.md which had syntax the linter would raise errors to and we can see the linter ignored the file.

Below we can see what happens before our solution was implemented and we can see the linter was not working and instead raising errors about HF_test_Template.md

Verification of the configuration file being respected below:

Here is the test MD file we used to ensure the linter respects our rules in mardownlint.json.

# Test File for Markdownlint Config

## Rule MD007: Indentation (Should allow 4 spaces)

* Level 1
    * Level 2 (This uses 4 spaces. If the linter errors, the config isn't working.)

## Rule MD013: Line Length (Should be ignored)

This is an incredibly long line of text that exceeds the default 80-character limit usually enforced by markdownlint. Because MD013 is set to false, this line should not trigger any warnings or errors regardless of how long it gets.

## Rule MD026: Trailing Punctuation (Should allow only specific marks)

### This header ends with a question mark?

### This header ends with an exclamation point!

## Rule MD040: Fenced Code Language (Should be ignored)

```
This code block has no language specified. Normally, this triggers a warning, but it should be ignored now.
```

## Rule MD046: Code Block Style (Should be ignored)

    This is an indented code block (4 spaces).
    Normally, markdownlint prefers fenced blocks (```), but this should be ignored.

## Hard Tabs (Should be allowed)

*	This line uses a hard tab after the bullet point instead of a space.

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Closes #52

[Copilot]

Pull request overview

This PR fixes the markdownlint GitHub Action workflow to properly ignore template files that should not be linted. The issue was that the .markdownlintignore file was not being respected, so the solution adds explicit files_ignore patterns to the tj-actions/changed-files action configuration to prevent ignored files from being passed to the linter.

Changes:

• Added files_ignore parameter to the changed-files action to exclude HuggingFace template files and mkdocs.yaml from markdown linting

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