feat(dashboard.lua): add dashboard plugin and configuration for a customized dashboard

feat(magma.lua.disabled): add magma plugin and configuration, but disable it for now

lua/absolute/plugins/magma.lua.disabled

@@ -0,0 +1,7 @@
+return {
+    "dccsillag/magma-nvim",
+    config = function()
+        vim.cmd([[ UpdateRemotePlugins ]])
+        require("absolute.after.magma")
+    end
+}