feat: allow excluding filetypes from selector autolaunch. (#1937)

Co-authored-by: doodleEsc <cokie@foxmail.com>
Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

lua/avante/sidebar.lua

@@ -1548,6 +1548,10 @@ function Sidebar:initialize()
 
   if not self.code.bufnr or not api.nvim_buf_is_valid(self.code.bufnr) then return self end
 
+  -- check if the filetype of self.code.bufnr is disabled
+  local buf_ft = api.nvim_get_option_value("filetype", { buf = self.code.bufnr })
+  if vim.list_contains(Config.selector.exclude_auto_select, buf_ft) then return self end
+
   local buf_path = api.nvim_buf_get_name(self.code.bufnr)
   -- if the filepath is outside of the current working directory then we want the absolute path
   local filepath = Utils.file.is_in_cwd(buf_path) and Utils.relative_path(buf_path) or buf_path