feat(pack): add Harper (#1199)

feat(utility): add `harper-ls` integration

lua/astrocommunity/pack/harper/README.md

@@ -0,0 +1,31 @@
+# Harper LS
+
+[Harper](https://writewithharper.com) is an English grammar checker designed to be _just right_.
+
+**Repository:** <https://github.com/elijah-potter/harper/blob/master/harper-ls>
+
+## How do I set my own LSP configuration?
+
+To add your configuration, you have to extend `AstroNvim/astrolsp` opts.
+
+> See the options that `harper-ls` support [here](https://github.com/elijah-potter/harper/blob/master/harper-ls/README.md#configuration).
+
+```lua
+---@type LazySpec
+return {
+  {
+    "AstroNvim/astrolsp",
+    opts = {
+      config = {
+        harper_ls = {
+          settings = {
+            ["harper-ls"] = {
+              --- Your configuration
+            },
+          },
+        },
+      },
+    },
+  },
+}
+```

lua/astrocommunity/pack/harper/init.lua

@@ -0,0 +1,39 @@
+---@type LazySpec
+return {
+  {
+    "AstroNvim/astrolsp",
+    optional = true,
+    ---@type AstroLSPOpts
+    opts = {
+      ---@diagnostic disable-next-line: missing-fields
+      config = {
+        harper_ls = {
+          settings = {
+            ["harper-ls"] = {
+              codeActions = {
+                forceStable = true,
+              },
+              linters = {
+                spelled_numbers = true,
+                linking_verbs = true,
+              },
+            },
+          },
+        },
+      },
+    },
+  },
+  {
+    "williamboman/mason-lspconfig.nvim",
+    opts = function(_, opts)
+      opts.ensure_installed = require("astrocore").list_insert_unique(opts.ensure_installed, { "harper-ls" })
+    end,
+  },
+  {
+    "WhoIsSethDaniel/mason-tool-installer.nvim",
+    optional = true,
+    opts = function(_, opts)
+      opts.ensure_installed = require("astrocore").list_insert_unique(opts.ensure_installed, { "harper-ls" })
+    end,
+  },
+}