feat(plugins): add multiple new Lua plugins for various functionalities

feat(plugins): add various new Lua plugins for Neovim configuration.

feat(plugins): add venv-selector, vim-maximizer, and vim-tmux-navigator plugins to enhance functionality

lua/absolute/plugins/nvim-cmp.lua

@@ -0,0 +1,18 @@
+return {
+    'hrsh7th/nvim-cmp',
+    event = "InsertEnter",
+    dependencies = {
+        'neovim/nvim-lspconfig',
+        'hrsh7th/cmp-nvim-lsp',
+        'hrsh7th/cmp-buffer',           --source for text in buffer
+        'hrsh7th/cmp-path',             --source for file system paths
+        'hrsh7th/cmp-cmdline',
+        "saadparwaiz1/cmp_luasnip",     --source for autocompletion
+        "onsails/lspkind.nvim",
+        "L3MON4D3/LuaSnip",             --Snippet Engine
+        "rafamadriz/friendly-snippets", --Useful snippets
+    },
+    config = function()
+        require("absolute.after.nvim-cmp")
+    end
+}