nvim: Use ag as any jump preferred search engine

While I would ideally like to use rg, it seems any jump does or cannot
use rg for some reasons for certain languages like Haskell. This can be
seen from the language map in any jump repo. So set preferred engine as
ag for now.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

nvim/.config/nvim/init.vim

@@ -706,7 +706,8 @@ let g:floaterm_winblend      = 0
 let g:floaterm_borderchars   = ['─', '│', '─', '│', '╭', '╮', '╯', '╰']
 
 " Any jump
-let g:any_jump_disable_default_keybindings = v:true
+let g:any_jump_disable_default_keybindings = 1
+let g:any_jump_search_prefered_engine = 'ag'
 " Lens vim
 let g:lens#disabled_filetypes = ['nerdtree', 'fzf', 'qf']