refactor(log): simplify notification handling with helper function

Introduced a `notify` helper function to call `vim.notify` with a
schedule. Updated `M.warn` and `M.inform` to use this helper,
reducing code duplication in `log.lua`.

This commit was co-authored by @PMassicotte

lua/r/log.lua

@@ -1,25 +1,21 @@
+--- Helper function to call vim.notify() with scheduled execution
+---@param msg string
+---@param level number
+---@param opts table
+local function notify(msg, level, opts)
+    vim.schedule(function() vim.notify(msg, level, opts) end)
+end
+
 local M = {}
 
 --- Call vim.notify() with a warning message
 ---@param msg string
-M.warn = function(msg)
-    vim.schedule(
-        function() vim.notify(msg, vim.log.levels.WARN, { title = "R.nvim" }) end
-    )
-end
+M.warn = function(msg) notify(msg, vim.log.levels.WARN, { title = "R.nvim" }) end
 
---- Call vim.notify() with to inform a message
+--- Call vim.notify() to inform a message
 ---@param msg string
 M.inform = function(msg)
-    vim.schedule(
-        function()
-            vim.notify(
-                msg,
-                vim.log.levels.INFO,
-                { title = "R.nvim", hide_from_history = true }
-            )
-        end
-    )
+    notify(msg, vim.log.levels.INFO, { title = "R.nvim", hide_from_history = true })
 end
 
 return M