feat(display_mode): split or float

closes #300.

docs/docs/getting-started/configuration-options.md

@@ -16,6 +16,9 @@ the Kulala plugin with the available `opts`:
     -- you can specify it here
     curl_path = "curl",
 
+    -- Display mode, possible values: "split", "float"
+    display_mode = "split",
+
     -- split direction
     -- possible values: "vertical", "horizontal"
     split_direction = "vertical",
@@ -125,10 +128,32 @@ Example:
   },
 }
 ```
+
+### display_mode
+
+The display mode.
+
+Can be either `split` or `float`.
+
+Default: `split`
+
+Example:
+
+```lua
+{
+  "mistweaverco/kulala.nvim",
+  opts = {
+    display_mode = "float",
+  },
+}
+```
+
 ### split_direction
 
 Split direction.
 
+Only used when `display_mode` is set to `split`.
+
 Possible values:
 
 - `vertical`

lua/kulala/config/init.lua

@@ -6,6 +6,9 @@ M.defaults = {
   -- if you have curl installed in a non-standard path,
   -- you can specify it here
   curl_path = "curl",
+  -- Display mode
+  -- possible values: "split", "float"
+  display_mode = "split",
   -- split direction
   -- possible values: "vertical", "horizontal"
   split_direction = "vertical",

lua/kulala/ui/init.lua

@@ -29,6 +29,26 @@ local get_win = function()
   return nil
 end
 
+local open_float = function()
+  local bufnr = vim.api.nvim_create_buf(false, false)
+  vim.api.nvim_buf_set_name(bufnr, "kulala://ui")
+
+  local width = vim.api.nvim_win_get_width(0) - 10
+  local height = vim.api.nvim_win_get_height(0) - 10
+
+  local winnr = vim.api.nvim_open_win(bufnr, true, {
+    title = "Kulala",
+    title_pos = "center",
+    relative = "editor",
+    border = "single",
+    width = width,
+    height = height,
+    row = math.floor(((vim.o.lines - height) / 2) - 1),
+    col = math.floor((vim.o.columns - width) / 2),
+    style = "minimal",
+  })
+end
+
 local get_buffer = function()
   -- Iterate through all buffers
   for _, buf in ipairs(vim.api.nvim_list_bufs()) do
@@ -70,7 +90,7 @@ local replace_buffer = function()
   return new_bufnr
 end
 
-local open_buffer = function()
+local open_split = function()
   local prev_win = vim.api.nvim_get_current_win()
   local sd = CONFIG.get().split_direction == "vertical" and "vsplit" or "split"
   vim.cmd("keepalt " .. sd .. " " .. GLOBALS.UI_ID)
@@ -80,6 +100,14 @@ local open_buffer = function()
   vim.api.nvim_set_current_win(prev_win)
 end
 
+local open_buffer = function()
+  if CONFIG.get().display_mode == "split" then
+    open_split()
+  else
+    open_float()
+  end
+end
+
 local close_buffer = function()
   vim.cmd("bdelete! " .. GLOBALS.UI_ID)
 end