feat(pack): add eslint

lua/astrocommunity/pack/eslint/README.md

@@ -0,0 +1,14 @@
+# ESLint
+
+[ESLint](https://eslint.org/) is a tool for identifying and reporting on
+patterns found in ECMAScript/JavaScript code, with the goal of making code more
+consistent and avoiding bugs.
+
+ESLint is completely pluggable. Every single rule is a plugin and you can add
+more at runtime. You can also add community plugins, configurations, and
+parsers to extend the functionality of ESLint.
+
+## Prerequisites
+
+To use ESLint, you must have [Node.js](https://nodejs.org/en/) (^18.18.0, ^20.9.0, or >=21.1.0) installed
+and built with SSL support. (If you are using an official Node.js distribution, SSL is always built in.)

lua/astrocommunity/pack/eslint/init.lua

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+---@type LazySpec
+return {
+  {
+    "williamboman/mason-lspconfig.nvim",
+    optional = true,
+    opts = function(_, opts)
+      opts.ensure_installed = require("astrocore").list_insert_unique(opts.ensure_installed or {}, { "eslint" })
+    end,
+  },
+  {
+    "WhoIsSethDaniel/mason-tool-installer.nvim",
+    optional = true,
+    opts = function(_, opts)
+      opts.ensure_installed = require("astrocore").list_insert_unique(opts.ensure_installed or {}, { "eslint-lsp" })
+    end,
+  },
+  {
+    "echasnovski/mini.icons",
+    optional = true,
+    opts = function(_, opts)
+      opts.file = opts.file or {}
+      local eslint_files = {
+        -- ESLint <=8 (Deprecated)
+        ".eslintignore",
+        ".eslintrc",
+        ".eslintrc.cjs",
+        ".eslintrc.js",
+        ".eslintrc.json",
+        ".eslintrc.yaml",
+        ".eslintrc.yml",
+        -- ESLint >=9
+        "eslint.config.cjs",
+        "eslint.config.cts",
+        "eslint.config.js",
+        "eslint.config.mjs",
+        "eslint.config.mts",
+        "eslint.config.ts",
+      }
+      for _, filename in ipairs(eslint_files) do
+        opts.file[filename] = { glyph = "󰱺", hl = "MiniIconsYellow" }
+      end
+    end,
+  },
+}