feat: use virtual title in notifications if title is not supported (#2439)

* feat: use virtual title in notifications if title is not supported

* Fix boolean expressions

* Replace `pcall` with `package.loaded`

* Detect title support before sending notification

* Prevent `title_support` from being nil after evaluation

* temporary stylua suppression

---------

Co-authored-by: Alexander Courtis <alex@courtis.org>

lua/nvim-tree.lua

@@ -15,12 +15,7 @@ local modified = require "nvim-tree.modified"
 local find_file = require "nvim-tree.actions.tree.find-file"
 local open = require "nvim-tree.actions.tree.open"
 local events = require "nvim-tree.events"
-
-local function notify_once(msg, level)
-  vim.schedule(function()
-    vim.notify_once(msg, level or vim.log.levels.WARN, { title = "NvimTree" })
-  end)
-end
+local notify = require "nvim-tree.notify"
 
 local _config = {}
 
@@ -730,7 +725,7 @@ local function validate_options(conf)
           if msg then
             msg = string.format("%s\n%s", msg, invalid)
           else
-            msg = string.format("[NvimTree]\n%s", invalid)
+            msg = invalid
           end
           user[k] = nil
         else
@@ -743,7 +738,7 @@ local function validate_options(conf)
   validate(conf, DEFAULT_OPTS, ACCEPTED_STRINGS, ACCEPTED_TYPES, "")
 
   if msg then
-    notify_once(msg .. "\n\nsee :help nvim-tree-opts for available configuration options")
+    notify.warn(msg .. "\n\nsee :help nvim-tree-opts for available configuration options")
   end
 end
 
@@ -766,7 +761,7 @@ end
 
 function M.setup(conf)
   if vim.fn.has "nvim-0.8" == 0 then
-    notify_once "nvim-tree.lua requires Neovim 0.8 or higher"
+    notify.warn "nvim-tree.lua requires Neovim 0.8 or higher"
     return
   end