feat(pack): Add zig pack (#557)

lua/astrocommunity/pack/zig/README.md

@@ -0,0 +1,14 @@
+# Zig Language Pack
+
+**Requirements:**
+
+- git (required by zig-tools)
+- curl / wget (required by zig-tools)
+- Neovim (>= 0.7.x)
+- ripgrep (>= 11.0)
+
+This plugin pack does the following:
+
+- Adds `zig` Treesitter parsers
+- Adds `zls` language server
+- Adds [zig-tools.nvim](https://github.com/NTBBloodbath/zig-tools.nvim)

lua/astrocommunity/pack/zig/init.lua

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+local utils = require "astronvim.utils"
+
+return {
+  {
+    "nvim-treesitter/nvim-treesitter",
+    opts = function(_, opts)
+      if opts.ensure_installed ~= "all" then
+        opts.ensure_installed = utils.list_insert_unique(opts.ensure_installed, { "zig" })
+      end
+    end,
+  },
+  {
+    "williamboman/mason-lspconfig.nvim",
+    opts = function(_, opts) opts.ensure_installed = utils.list_insert_unique(opts.ensure_installed, "zls") end,
+  },
+
+  {
+    "NTBBloodbath/zig-tools.nvim",
+    -- Load zig-tools.nvim only in Zig buffers
+    ft = { "zig" },
+    opts = {},
+    dependencies = {
+      "akinsho/toggleterm.nvim",
+      "nvim-lua/plenary.nvim",
+    },
+  },
+}