feat(grep): opts.regex convenience alias

Same as using `search=... no_esc=true`.

Author: ibhagwan

lua/fzf-lua/defaults.lua

@@ -849,6 +849,8 @@ M.defaults.git                   = {
 ---@field raw_cmd? string
 ---Initial search string.
 ---@field search? string
+---Initial search pattern.
+---@field regex? string
 ---Disable escaping of special characters in the search query, set to `2` to disable escaping and regex mode.
 ---@field no_esc? integer|boolean
 ---Enable live grep mode (search-as-you-type).

lua/fzf-lua/providers/grep.lua

@@ -21,6 +21,13 @@ M.grep = function(opts)
   -- we need this for `actions.grep_lgrep`
   opts.__ACT_TO = opts.__ACT_TO or M.live_grep
 
+  -- regex as alias to search+no_esc
+  if opts.regex then
+    opts.search = opts.regex
+    opts.no_esc = true
+    opts.regex = nil
+  end
+
   if not opts.search and not opts.raw_cmd then
     -- resume implies no input prompt
     if opts.resume then
@@ -64,6 +71,13 @@ local function normalize_live_grep_opts(opts)
   opts = config.normalize_opts(opts, "grep")
   if not opts then return end
 
+  -- regex as alias to search+no_esc
+  if opts.regex then
+    opts.search = opts.regex
+    opts.no_esc = true
+    opts.regex = nil
+  end
+
   -- auto disable treesitter as it collides with cmd regex highlighting
   -- ignore if forced with `_treesitter = true` (#2511)
   if opts._treesitter == 1 then opts = utils.map_set(opts, "winopts.treesitter", false) end