feat: Shortcode attributes

[HenrijsS]

Wanted to finally contribute something to oss, so I added the option to use attributes/variables to shortcodes.
For each snippet is a tag-like selector which forces you to select what variables to use in the script and shortcode (otherwise any shortcode user could overwrite any variables in the whole function).

Let me know if there's anything else to change.

References: #27

P.S.: I think the last Commit didn't run as npx mix --production but commited the same watch. That's why there's a ton of removals. Probably all the whitespace in app.js

Github Copilot Summary

This pull request introduces functionality for handling shortcode attributes in snippets. The changes span multiple files, adding new methods and updating existing ones to support this feature.

Shortcode Attributes Handling:

• app/Helpers/Helper.php: Added shortcode_attributes to the list of fields.

• app/Hooks/Handlers/AdminMenuHandler.php: Updated the render method to retrieve and pass shortcode_attributes to the view. [1] [2]

• app/Hooks/Handlers/CodeHandler.php: Enhanced the handleShortcode method to validate and process shortcode attributes. [1] [2]

• app/Model/Snippet.php: Added getAllShortcodeAttributes method and updated parseBlock and parseInputMeta methods to handle shortcode_attributes. [1] [2] [3]

Frontend Components:

• src/components/_ShortcodeAttributeCreator.vue: Introduced a new component to create and manage shortcode attributes.

• src/components/_SnippetForm.vue: Integrated ShortcodeAttributeCreator into the snippet form to allow users to define shortcode attributes. [1] [2]