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/bash/.bashrc

@@ -0,0 +1,63 @@
+# If not running interactively, don't do anything (leave this at the top of this file)
+[[ $- != *i* ]] && return
+
+# All the default Omarchy aliases and functions
+source ~/.local/share/omarchy/default/bash/rc
+
+# =============================================================================
+# --- AGENTE SSH PERSISTENTE (INICIO AUTOMÁTICO) ---
+# Se inicia si GNOME Keyring NO configuró el agente ($SSH_AUTH_SOCK está vacío).
+# =============================================================================
+if [ -z "$SSH_AUTH_SOCK" ]; then
+    export SSH_AGENT_DIR="$HOME/.ssh/agent"
+    mkdir -p "$SSH_AGENT_DIR" 2>/dev/null
+    SSH_ENV="$SSH_AGENT_DIR/env"
+    
+    start_agent() {
+        echo "🔑 Iniciando ssh-agent persistente..."
+        ssh-agent > "$SSH_ENV"
+        chmod 600 "$SSH_ENV"
+        . "$SSH_ENV" > /dev/null
+    }
+    
+    if [ -f "$SSH_ENV" ]; then
+        . "$SSH_ENV" > /dev/null
+        ps -p $SSH_AGENT_PID > /dev/null 2>&1 || start_agent
+    else
+        start_agent
+    fi
+    
+    # Bucle para añadir claves automáticamente.
+    if [ -d "$HOME/.ssh" ]; then
+        for key in "$HOME/.ssh"/*; do
+            if [ -f "$key" ] && [[ ! "$key" =~ \.pub$ ]] && \
+               [[ ! "$key" =~ known_hosts ]] && [[ ! "$key" =~ authorized_keys ]] && \
+               [[ ! "$key" =~ config ]] && [[ ! "$key" =~ agent ]]; then
+                
+                if ssh-keygen -l -f "$key" &>/dev/null; then
+                    local key_fingerprint=$(ssh-keygen -lf "$key" 2>/dev/null | awk '{print $2}')
+                    
+                    if ! ssh-add -l 2>/dev/null | grep -q "$key_fingerprint"; then
+                        if ssh-add "$key" 2>/dev/null; then
+                            echo "✅ Clave SSH agregada: $(basename $key)"
+                        fi
+                    fi
+                fi
+            fi
+        done
+    fi
+fi
+# =============================================================================
+
+
+# OMARCHY: AUTO-LAUNCH ZSH
+# Lanzar Zsh automáticamente si no estamos ya en Zsh
+if [ -t 1 ] && [ -z "$ZSH_VERSION" ] && command -v zsh &>/dev/null; then
+    # Inicializar Homebrew si existe antes de cambiar de shell
+    if [ -f "/home/linuxbrew/.linuxbrew/bin/brew" ]; then
+        eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
+    fi
+    exec zsh
+fi
+
+. "$HOME/.local/share/../bin/env"