docs(v3.5.0): update README for integrated mg_dotfiles and security improvements

- Integrated mg_dotfiles as regular directory (not submodule)
- Added .zshrc.local.example template for local configs without secrets
- Added mg_dotfiles/zsh/.zshrc.local to .gitignore to protect API keys
- Updated README to reflect mg_dotfiles integration and new structure
- Added nvim configuration directory with LazyVim setup

mg_dotfiles/omarchy/hypr/looknfeel.conf

@@ -0,0 +1,30 @@
+# Change the default Omarchy look'n'feel
+
+# https://wiki.hyprland.org/Configuring/Variables/#general
+general {
+    # No gaps between windows or borders
+    # gaps_in = 0
+    # gaps_out = 0
+    # border_size = 0
+
+    # Use master layout instead of dwindle
+    # layout = master
+}
+
+# https://wiki.hyprland.org/Configuring/Variables/#decoration
+decoration {
+    # Use round window corners
+    # rounding = 8
+}
+
+# https://wiki.hypr.land/Configuring/Dwindle-Layout/
+dwindle {
+    # Avoid overly wide single-window layouts on wide screens
+    # single_window_aspect_ratio = 1 1
+}
+
+# https://wiki.hyprland.org/Configuring/Variables/#misc
+misc {
+    # Note: on_focus_under_fullscreen option was removed in Hyprland 0.52+
+    # This section overrides the default config that uses the removed option
+}