chore: move plugins.lua and configurations into a separate directory

neovim/lua/plugins/init.lua

@@ -8,19 +8,19 @@ return require("packer").startup(function(use)
   use {
     "folke/tokyonight.nvim",
     commit = "fd9105c9487996aa2269992b72a6fea7504688e4", -- 2022-10-05
-    config = require("config.tokyonight"),
+    config = require("plugins.config.tokyonight"),
   }
 
   use {
     "neovim/nvim-lspconfig",
     commit = "1c2a57d991548995030748088a7ded73a7b5f496", -- 2022-10-06
-    config = require("config.lsp"),
+    config = require("plugins.config.lsp"),
   }
 
   use {
     "nvim-treesitter/nvim-treesitter",
     commit = "a33858d399d0da226b0cf7b45fe9dc8f0a06547b", -- 2022-10-06
-    config = require("config.treesitter"),
+    config = require("plugins.config.treesitter"),
     run    = ":TSUpdate",
   }
 
@@ -33,13 +33,13 @@ return require("packer").startup(function(use)
     "akinsho/bufferline.nvim",
     tag      = "v2.12.0",                                 -- 2022.10.03
     requires = "kyazdani42/nvim-web-devicons",
-    config   = require("config.bufferline"),
+    config   = require("plugins.config.bufferline"),
   }
 
   use {
     "is0n/tui-nvim",
     commit = "2eeff3ac921f53bdb837d23d6e4501d97807994c",  -- 2022.05.07
-    config = require("config.tui_nvim"),
+    config = require("plugins.config.tui_nvim"),
   }
 
 end)