Feat: add rustaceanvim plugin

lua/custom/plugins/rustacea.lua

@@ -0,0 +1,35 @@
+return {
+  'mrcjkb/rustaceanvim',
+  version = '^4',
+  dependencies = {
+    {
+      'lvimuser/lsp-inlayhints.nvim',
+      opts = {},
+    },
+  },
+  ft = { 'rust' },
+  keys = {
+    {
+      '<leader>dr',
+      '<cmd>RustLsp debuggables<cr>',
+      'Rust debug',
+    },
+  },
+  config = function()
+    vim.g.rustaceanvim = {
+      inlay_hints = {
+        highlight = 'NonText',
+      },
+      tools = {
+        hover_actions = {
+          auto_focus = true,
+        },
+      },
+      server = {
+        on_attach = function(client, bufnr)
+          require('lsp-inlayhints').on_attach(client, bufnr)
+        end,
+      },
+    }
+  end,
+}