Use absolute path for viml config

Full path should be used to load viml config, otherwise, when we open
nvim in other directories, we see errors that the viml config can not be
found.

init.lua

@@ -16,15 +16,18 @@ local utils = require("utils")
 local expected_version = "0.10.1"
 utils.is_compatible_version(expected_version)
 
+local config_dir = vim.fn.stdpath("config")
+---@cast config_dir string
+
 -- some global settings
 require("globals")
 -- setting options in nvim
-vim.cmd("source viml_conf/options.vim")
+vim.cmd("source " .. vim.fs.joinpath(config_dir, "viml_conf/options.vim"))
 -- various autocommands
 require("custom-autocmd")
 -- all the user-defined mappings
 require("mappings")
 -- all the plugins installed and their configurations
-vim.cmd("source viml_conf/plugins.vim")
+vim.cmd("source ".. vim.fs.joinpath(config_dir, "viml_conf/plugins.vim"))
 -- colorscheme settings
 require("colorschemes")