Integrate Plugin Check Namer as standard AI Name Check

[ishitaj34]

What?

Closes #1370

Migrates the standalone Plugin Check Namer tool directly into the main audit suite as a standard static check. It deprecates and removes the separate Namer submenu page and its custom JS/HTML frontend assets.

Why?

• Simplifies UX by combining all directory requirement checks into a single scan report.
• Improves maintainability by removeing custom AJAX endpoints, settings, JavaScript workarounds, etc. by using the core static check framework.
• Adds WP-CLI support by running AI name analysis through the standard static check pipeline, enabling wp plugin check <slug> --ai without custom CLI handling.

How?

• Created AI_Name_Check.php implementing Static_Check. It parses the name and author from plugin headers via get_plugin_data() and runs AI queries if the active runner has enabled AI. Guideline violations are mapped directly to standard check Errors and Warnings.
• Registered check in Default_Check_Repository.php so it is included in the default check set.
• Made should_use_ai() public and added get_ai_model_preference() to allow checks to access the current AI configuration.
• Removed the deprecated Namer workflow by deleting the submenu registration from Plugin_Main.php and removing unused files.
• Added unit test to verify.

Testing Instructions

Via Admin Screen:

1. Navigate to Tools -> Plugin Check in the WordPress Admin area.
2. Choose a plugin to test.
3. Toggle the "Enable AI Analysis" option under AI Settings.
4. Click Check It.
5. Verify that the name and guidelines analysis runs and formats any conflicts/similarities directly as Error or Warning rows inside the result tables.

Via CLI:

1. Run standard checks with AI enabled:

wp plugin check <plugin-slug> --ai

2. Verify that name guideline check runs and displays output inline with the rest of the check failures.

Run Unit Tests:

1. Boot up test suite:

npm run wp-env:start:tests

2. Run tests to confirm AI_Name_Check_Tests executes and passes:

npm run test-php

AI Usage Disclosure

• This PR was created without the help of AI tools
• This PR includes AI-assisted code or content

If AI tools were used, please describe how they were used:

Used Gemini coding assistant to plan the refactoring path, draft unit test suite, and compile the deprecation cleanup list.

[davidperezgar]

Hello! Thanks for the contribution. Please resolve the conflicts, so we can review this PR.