Update themes and some key bindings

lua/plugins/config/catppuccin.lua

@@ -0,0 +1,14 @@
+vim.g.catppuccin_flavour = "mocha"
+
+require("catppuccin").setup {
+    styles = {
+        loops = { "italic" },
+        functions = { "italic", "bold" }
+    },
+
+    integrations = {
+        lsp_trouble = true,
+        which_key = true,
+        barbar = true
+    }
+}