Add :QuickFiles command to add files to quickfix list

plugin/commands.lua

@@ -205,3 +205,35 @@ end, { range = true })
 vim.api.nvim_create_user_command('DiagnosticToggle', function(_)
   vim.diagnostic.enable(not vim.diagnostic.is_enabled())
 end, {})
+
+-- :QuickFiles creates a floating window for the user to input a list of files
+-- then populates and opens the quickfix list.
+vim.api.nvim_create_user_command('QuickFiles', function()
+  -- Create scratch buffer & set options
+  local buffer = vim.api.nvim_create_buf(false, true)
+  vim.bo[buffer].errorformat = "%f"
+
+  -- Calculate floating window dimensions
+  local ui = vim.api.nvim_list_uis()[1]
+  local width = math.floor(ui.width * 0.6)
+  local height = math.floor(ui.height * 0.4)
+
+  -- Create the floating window
+  local window = vim.api.nvim_open_win(buffer, true, {
+    relative = 'editor',
+    width = width,
+    height = height,
+    row = math.floor((ui.height - height) / 2),
+    col = math.floor((ui.width - width) / 2),
+    style = 'minimal',
+    border = 'rounded',
+    title = 'QuickFiles',
+    title_pos = "center",
+  })
+
+  vim.keymap.set('n', 'q', function()
+    vim.cmd.cbuffer()
+    vim.api.nvim_win_close(window, true)
+    vim.cmd.cwindow()
+  end, { buffer = buffer, nowait = true, silent = true })
+end, {})