feat: update documentation and configuration files for Neovim setup

Signed-off-by: juliano.barbosa <julianomb@gmail.com>

lua/custom/plugins/keymaps.lua

@@ -1,3 +1,28 @@
+# MIT License
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+if not vim then
+  return
+end
+local bufnr = vim.api.nvim_get_current_buf()
+
 return {
   -- local function map(mode, lhs, rhs, opts)
   --   local options = { noremap=true, silent=true }
@@ -7,31 +32,21 @@ return {
   --   vim.api.nvim_set_keymap(mode, lhs, rhs, options)
   -- end
 
-  vim.keymap.set('n', '<leader>ff', ":Telescope find_files<cr>", {}),
-  vim.keymap.set('n', '<leader>fg', ":Telescope live_grep<cr>", {}),
-  vim.keymap.set('n', '<leader>fb', ":Telescope buffers<cr>", {}),
-  vim.keymap.set('n', '<leader>fh', ":Telescope help_tags", {}),
+  vim.keymap.set('n', '<leader>ff', ':Telescope find_files<cr>', {}),
+  vim.keymap.set('n', '<leader>fg', ':Telescope live_grep<cr>', {}),
+  vim.keymap.set('n', '<leader>fb', ':Telescope buffers<cr>', {}),
+  vim.keymap.set('n', '<leader>fh', ':Telescope help_tags', {}),
 
   -- map("n", "<s-h>", ":bn")
-  vim.keymap.set(
-    'n',
-    '<S-h>',
-    ":bp<cr>",
-    {
-      buffer = bufnr,
-      desc = '[G]o to [P]revious Buffer'
-    }
-  ),
+  vim.keymap.set('n', '<S-h>', ':bp<cr>', {
+    buffer = bufnr,
+    desc = '[G]o to [P]revious Buffer',
+  }),
   -- map("n", "<s-l>", ":bp")
-  vim.keymap.set(
-    'n',
-    '<S-l>',
-    ":bn<cr>",
-    {
-      buffer = bufnr,
-      desc = '[G]o to [N]ext Buffer'
-    }
-  )
+  vim.keymap.set('n', '<S-l>', ':bn<cr>', {
+    buffer = bufnr,
+    desc = '[G]o to [N]ext Buffer',
+  }),
 
   -- map("n", "<leader>bq", ":Bdelete")
   -- vim.keymap.set(