fix(picker): lsp_config now includes any configfured LSP and excludes deprecated servers

lua/snacks/picker/source/lsp/config.lua

@@ -12,6 +12,7 @@ local has_11 = vim.fn.has("nvim-0.11") == 1
 ---@field attached_buf? boolean
 ---@field enabled? boolean
 ---@field installed? boolean
+---@field deprecated? boolean
 ---@field cmd? string[]
 ---@field bin? string
 
@@ -19,6 +20,7 @@ local has_11 = vim.fn.has("nvim-0.11") == 1
 ---@field config vim.lsp.Config
 ---@field enabled? boolean
 ---@field docs? string
+---@field deprecated? boolean
 
 ---@param name string
 local function is_enabled(name)
@@ -33,9 +35,14 @@ end
 local function get_config(name)
   local modpath = vim.api.nvim_get_runtime_file("lsp/" .. name .. ".lua", false)[1]
   local ret = { config = {} } ---@type snacks.picker.lsp.config.Config
+  local deprecate = vim.deprecate
+  vim.deprecate = function()
+    ret.deprecated = true
+  end
   local ok, config = pcall(function()
     return has_11 and vim.lsp.config[name] or loadfile(modpath)() or {}
   end)
+  vim.deprecate = deprecate
   ret.config = ok and config or {}
   ret.enabled = is_enabled(name)
   local lines = modpath and Snacks.picker.util.lines(modpath) or {}
@@ -57,15 +64,19 @@ end
 ---@type snacks.picker.finder
 function M.find(opts, ctx)
   local all = vim.api.nvim_get_runtime_file("lsp/*.lua", true)
-  local available = {} ---@type string[]
+  local available = {} ---@type table<string, string>
   for _, f in ipairs(all) do
     local name = f:match("([^/\\]+)%.lua$")
     if name then
-      available[#available + 1] = name
+      available[name] = name
     end
   end
 
-  if #all == 0 then
+  for name in pairs(has_11 and vim.lsp.config._configs or {}) do
+    available[name] = name
+  end
+
+  if vim.tbl_count(available) == 0 then
     Snacks.notify.warn("No LSP configurations found?")
     return {}
   end
@@ -78,6 +89,7 @@ function M.find(opts, ctx)
     item.config = item.config or mod.config
     item.cmd = item.cmd or mod.config.cmd
     item.enabled = item.enabled or mod.enabled
+    item.deprecated = mod.deprecated
   end
 
   local items = {} ---@type table<string, snacks.picker.lsp.config.Item>
@@ -97,7 +109,7 @@ function M.find(opts, ctx)
     items[client.name].attached_buf = items[client.name].buffers[main_buf]
   end
 
-  for _, name in ipairs(available) do
+  for name in pairs(available) do
     items[name] = items[name] or {
       name = name,
       buffers = {},
@@ -136,6 +148,7 @@ function M.find(opts, ctx)
           want = false
         end
       end
+      want = want and not item.deprecated
       if want then
         cb({
           name = name,