feat(pack): add eslint

[azdanov]

Issue: #1501

📑 Description

Adds ESLint based on the typescript pack. Needs testing and maybe potentially adding eslint.d support to replace EslintFixAll autocmd.

ℹ Additional Information

See #1496 for discussion on EslintFixAll

[github-actions]

Review Checklist

Does this PR follow the [Contribution Guidelines](development guidelines)? Following is a partial checklist:

Proper conventional commit scoping:

• If you are adding a new plugin, the scope would be the name of the category it is being added into. ex. feat(utility): added noice.nvim plugin

• If you are modifying a pre-existing plugin or pack, the scope would be the name of the plugin folder. ex. fix(noice-nvim): fix LSP handler error

• Pull request title has the appropriate conventional commit type and scope where the scope is the name of the pre-existing directory in the project as described above

• README is properly formatted and uses fenced in links with <url> unless they are inside a [title](url)

• Entry returns a single plugin spec with the new plugin as the only top level spec (not applicable for recipes or packs).

• Proper usage of opts table rather than setting things up with the config function.

• Proper usage of specs table for all specs that are not dependencies of a given plugin (not applicable for recipes or packs).

[Copilot]

Pull Request Overview

Adds ESLint integration to the Astro Neovim community pack by ensuring the ESLint LSP and tooling are installed and showing ESLint config files in MiniIcons.

• Ensures eslint server and eslint-lsp tool are installed via Mason
• Adds file icons for various .eslintrc* and eslint.config.* files in mini.icons
• Provides a README with prerequisites

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
lua/astrocommunity/pack/eslint/init.lua	Configures Mason to install ESLint LSP and tooling, and adds file icons for ESLint configs
lua/astrocommunity/pack/eslint/README.md	Adds basic README with ESLint description and prerequisites