feat: add buffer system

lua/chai/init.lua

@@ -1,6 +1,8 @@
 local M = {}
 
 local config = require('chai.config')
+local autocmds = require('chai.autocmds')
+local buffers = require('chai.buffers')
 local commands = require('chai.commands')
 
 --- initializes chai.nvim plugin
@@ -9,6 +11,9 @@ function M.setup(opts)
     -- set up configuration
     config.setup(opts)
 
+    buffers.setup()
+    autocmds.setup()
+
     -- add commands
     commands.setup()
 end