refactor!: remove insert_only config option

If you wish to restore this behavior, you can easily set a custom keymap
like so:
```lua
require("dressing").setup({
  input = {
    mappings = {
      i = {
        ["<Esc>"] = "Close",
      },
    },
  },
})
```

fixes #163

README.md

@@ -141,9 +141,6 @@ require("dressing").setup({
     -- Can be 'left', 'right', or 'center'
     title_pos = "left",
 
-    -- When true, <Esc> will close the modal
-    insert_only = true,
-
     -- When true, input will start in insert mode.
     start_in_insert = true,
 

doc/dressing.txt

@@ -19,9 +19,6 @@ Configure dressing.nvim by calling the setup() function.
         -- Can be 'left', 'right', or 'center'
         title_pos = "left",
 
-        -- When true, <Esc> will close the modal
-        insert_only = true,
-
         -- When true, input will start in insert mode.
         start_in_insert = true,
 

lua/dressing/config.lua

@@ -12,9 +12,6 @@ local default_config = {
     -- Can be 'left', 'right', or 'center'
     title_pos = "left",
 
-    -- When true, <Esc> will close the modal
-    insert_only = true,
-
     -- When true, input will start in insert mode.
     start_in_insert = true,
 

lua/dressing/input.lua

@@ -441,10 +441,6 @@ local show_input = util.make_queued_async_fn(2, function(opts, on_confirm)
     map_util.create_maps_to_plug(bufnr, mode, user_maps, "DressingInput:")
   end
 
-  if config.insert_only then
-    vim.keymap.set("i", "<Esc>", M.close, { buffer = bufnr })
-  end
-
   vim.bo[bufnr].filetype = "DressingInput"
   local default = string.gsub(opts.default or "", "\n", " ")
   vim.api.nvim_buf_set_lines(bufnr, 0, -1, true, { default })

tests/input_spec.lua

@@ -59,25 +59,6 @@ a.describe("input modal", function()
     assert(ret == nil, string.format("Got '%s' expected nil", ret))
   end)
 
-  a.it("cancels on <Esc> when insert_only = true", function()
-    require("dressing.config").input.insert_only = true
-    local ret = run_input({
-      "my text",
-      "<Esc>",
-    })
-    assert(ret == nil, string.format("Got '%s' expected nil", ret))
-  end)
-
-  a.it("does not cancel on <Esc> when insert_only = false", function()
-    require("dressing.config").input.insert_only = false
-    local ret = run_input({
-      "my text",
-      "<Esc>",
-      "<CR>",
-    })
-    assert(ret == "my text", string.format("Got '%s' expected 'my text'", ret))
-  end)
-
   a.it("returns cancelreturn when input is canceled <C-c>", function()
     local ret = run_input({
       "my text",