Add overlay filesystem support and update zinit configuration

- Added overlay.ko module installation for container support in install-firmware-minimal.sh
- Added udevmon service for hardware event monitoring
- Updated udev-trigger dependency to include udevmon
- Added placeholder configurations for mycelium and shm services

configs/zinit/mycelium.yaml

@@ -0,0 +1,6 @@
+exec: ip netns exec public /usr/bin/mycelium --key-file /tmp/mycelium_priv_key.bin
+  --tun-name my0 --silent --peers tcp://188.40.132.242:9651 tcp://136.243.47.186:9651
+  tcp://185.69.166.7:9651 tcp://185.69.166.8:9651 tcp://65.21.231.58:9651 tcp://65.109.18.113:9651
+  tcp://209.159.146.190:9651 tcp://5.78.122.16:9651 tcp://5.223.43.251:9651 tcp://142.93.217.194:9651
+after:
+  - network

configs/zinit/shm.yaml

@@ -0,0 +1 @@
+exec: /etc/zinit/shm.sh

configs/zinit/udev-trigger.yaml

@@ -1,4 +1,5 @@
 exec: sh /etc/zinit/init/udev.sh
 oneshot: true
 after:
+  - udevmon
   - udevd

configs/zinit/udevmon.yaml

@@ -0,0 +1 @@
+exec: udevadm monitor

scripts/install-firmware-minimal.sh

@@ -127,8 +127,12 @@ if [ -d "$KERNEL_BUILD_DIR" ]; then
     find "$KERNEL_BUILD_DIR" -name "mdio.ko" -exec cp {} "$MODULES_DIR/kernel/drivers/net/" \; 2>/dev/null || true
     find "$KERNEL_BUILD_DIR" -name "libphy.ko" -exec cp {} "$MODULES_DIR/kernel/drivers/net/" \; 2>/dev/null || true
     
+    # Filesystem drivers (overlay for container support)
+    find "$KERNEL_BUILD_DIR" -name "overlay.ko" -exec cp {} "$MODULES_DIR/kernel/fs/" \; 2>/dev/null || true
+    
     # Create modules directories
     mkdir -p "$MODULES_DIR/kernel/drivers"
+    mkdir -p "$MODULES_DIR/kernel/fs"
     
     # Create modules.dep and modules.alias for module loading
     echo "    Creating module dependency files..."