Add Phase 1 utility modules: crypto, networking, logging, stealth, resource, permissions, config_loader, bettercap_api

9 files in utils/ providing the shared infrastructure layer:
- crypto: AES-256-GCM file encryption, argon2id/PBKDF2 key derivation, HKDF network unlock, LUKS container management
- networking: interface detection, MAC/IP helpers, BPF compilation via libpcap ctypes, gratuitous ARP, VLAN creation
- logging: encrypted log writer (BBLogger) with rotation, per-module files, stdout suppression for stealth
- stealth: process rename via prctl, cmdline spoofing, sysctl helpers, timestomping, core dump disable
- resource: hardware tier detection (OPi Zero 3 / Pi Zero / generic) via /proc/device-tree and cpuinfo, resource monitoring
- permissions: root/capability checks via capget ctypes, privilege dropping, directory permission enforcement
- config_loader: YAML merge hierarchy (hardware_tiers -> bigbrother -> modules -> stealth -> CLI), tier auto-detection, SIGHUP reload
- bettercap_api: REST client with per-session random credentials, session/events/command methods

config/caplets/arp_mitm.cap

@@ -0,0 +1,5 @@
+set arp.spoof.fullduplex true
+set arp.spoof.internal false
+# targets set dynamically via API
+arp.spoof on
+net.sniff on

config/caplets/dns_spoof.cap

@@ -0,0 +1,3 @@
+set dns.spoof.all false
+# domains set dynamically via API
+dns.spoof on

config/caplets/full_mitm.cap

@@ -0,0 +1,7 @@
+set arp.spoof.fullduplex true
+set arp.spoof.internal false
+set http.proxy.sslstrip false
+set net.sniff.verbose false
+arp.spoof on
+http.proxy on
+net.sniff on

config/caplets/passive_recon.cap

@@ -0,0 +1,6 @@
+set net.sniff.verbose false
+set net.sniff.local true
+set net.sniff.output /tmp/bb_sniff.pcap
+net.recon on
+net.sniff on
+events.stream on

config/caplets/wifi_recon.cap

@@ -0,0 +1,2 @@
+wifi.recon on
+wifi.show