feat(telescope): add a filetype live grep

nvim/lua/olinpin/plugins/telescope.lua

@@ -47,6 +47,28 @@ return {
 				filesize_limit = 0.5, -- MB
 			},
 		})
+
+        local function grepInFiles()
+            local actions = require("telescope.actions")
+            local action_state = require("telescope.actions.state")
+            builtin.filetypes({
+                attach_mappings = function(prompt_bufnr, _)
+                    actions.select_default:replace(function()
+                        actions.close(prompt_bufnr)
+                        local selection = action_state.get_selected_entry()
+                        local filetype = selection.value
+
+                        builtin.live_grep({
+                            additional_args = function()
+                                return { "--glob", "*." .. filetype }
+                            end,
+                        })
+                    end)
+                    return true
+                end,
+            })
+        end
+        vim.keymap.set("n", "<leader>ft", grepInFiles, { desc = "Live grep by filetype" })
         vim.keymap.set('n', '<leader>*', builtin.grep_string, {desc = "Grep current string"})
         vim.keymap.set('n', '<leader>ff', builtin.find_files, {desc = "Find files"})
         vim.keymap.set('n', '<leader>fg', builtin.git_branches, {desc = "Find Git branches" })