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/hypridle.conf

@@ -0,0 +1,22 @@
+general {
+    lock_cmd = omarchy-lock-screen                         # lock screen and 1password
+    before_sleep_cmd = loginctl lock-session               # lock before suspend.
+    after_sleep_cmd = hyprctl dispatch dpms on             # to avoid having to press a key twice to turn on the display.
+    inhibit_sleep = 3                                      # wait until screen is locked
+}
+
+listener {
+    timeout = 150                                             # 2.5min
+    on-timeout = pidof hyprlock || omarchy-launch-screensaver # start screensaver (if we haven't locked already)
+}
+
+listener {
+    timeout = 151                      # 5min
+    on-timeout = loginctl lock-session # lock screen when timeout has passed
+}
+
+listener {
+    timeout = 330                                            # 5.5min
+    on-timeout = hyprctl dispatch dpms off                   # screen off when timeout has passed
+    on-resume = hyprctl dispatch dpms on && brightnessctl -r # screen on when activity is detected
+}