added nvim, swaylock config; updated river config

nvim/init.lua

@@ -0,0 +1,30 @@
+vim.o.number = true
+vim.o.tabstop = 4
+vim.o.shiftwidth = 4
+vim.o.expandtab = true
+vim.o.smartindent = true
+vim.o.cursorline = true
+
+vim.cmd( 'syntax enable' )
+vim.cmd( 'filetype plugin indent on' )
+
+vim.cmd( 'colorscheme slate' )
+
+vim.cmd [[
+    highlight Normal guibg=NONE ctermbg=NONE
+    highlight NonText guibg=NONE ctermbg=NONE
+    highlight EndOfBuffer guibg=NONE ctermbg=NONE
+]]
+
+vim.cmd [[
+    call plug#begin()
+    Plug 'preservim/nerdtree'
+    Plug 'neovim/nvim-lspconfig'
+    call plug#end()
+]]
+
+vim.lsp.enable( 'lua_ls' )
+vim.lsp.enable( 'rust_analyzer' )
+
+vim.g.mapleader = ' '
+vim.api.nvim_set_keymap( 'n', '<Leader>w', ':w<CR>', { noremap = true, silent = true } )