added nvim-cmp plugin

lua/core/plugins/luasnip.lua

@@ -0,0 +1,13 @@
+return {
+    "L3MON4D3/LuaSnip",
+
+    dependencies = {
+	"rafamadriz/friendly-snippets"
+    },
+
+    config = function()
+	local luasnip = require("luasnip.loaders.from_vscode")
+
+	luasnip.lazy_load()
+    end
+}