refactor: Reorganize validator architecture for distributed deployment

BREAKING CHANGE: Complete restructuring to support multi-network distributed validator deployment

Architecture Changes:
- Changed from shared single-machine to distributed multi-machine deployment
- 8 separate machines for 8 validators (beta testnet)
- Each validator builds own SDK and frontend locally
- Sequential bootnode connection (V2→V1, V3→V2, etc.)

New Structure:
- Multi-network support: beta_testnet, staging, mainnet
- Beta testnet: 8 validators with complete keys
- Staging: 20 validator slots (validator1 ready)
- Mainnet: 100 validator slots (validator1 ready)

Setup Script v3.0.0:
- Automatic dependency detection and installation
- Builds as actual user (fixes permission issues)
- Interactive bootnode configuration for validators > 1
- Systemd service generation per validator per network
- Nginx frontend deployment per validator

Usage:
sudo ./setup.sh <network> <validator_number>
Example: sudo ./setup.sh beta_testnet 8

Removed:
- scripts/ directory (helper scripts for shared deployment)
- validators/ directory (moved to beta_testnet/validators/)

Added:
- beta_testnet/ (8 validators with keys)
- staging/ (20 validator structure)
- mainnet/ (100 validator structure)
- Multi-network chain-specs directories

beta_testnet/validators/validator2/config/keys.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# ========================================
+# Validator 2 - Real Beta Testnet Keys
+# ========================================
+# Validator Name: Validator-beta-2
+# RPC Port: 9945
+# P2P Port: 30334
+
+# BABE Keys (Block Authorship)
+export BABE_SEED="nature pink baby physical hotel dirt soon meadow coin employ enroll remind"
+export BABE_PUBLIC_KEY="0xbef3df377441fe6ad64b81e84c8d201bc5c0bc2bb2e1a85f1e84927c62c5572b"
+
+# GRANDPA Keys (Finality)
+export GRAN_SEED="rent little raven auction error goat error water twice defy hard slab"
+export GRAN_PUBLIC_KEY="0x806cfed7a6d025bc2e7a195bcd5ac50317f824ce6971cf30f95c6a621d6e55bf"
+
+# PARA Keys (Parachain)
+export PARA_SEED="mystery rescue elbow update effort path sleep rather deer undo school size"
+export PARA_PUBLIC_KEY="0xfca6fd2976ae3ea397b15cdc5b0b044fe90a2094328edfa013db80cf04ba1a67"
+
+# ASGN Keys (Assignment)
+export ASGN_SEED="curious step vast scan couch episode maid trap crazy swap junior slab"
+export ASGN_PUBLIC_KEY="0xfaad0803c450bf084ca3035bd1d69481db58444b32dd0eaa55de69a5314b0559"
+
+# AUDI Keys (Authority Discovery)
+export AUDI_SEED="race frequent goose clean labor differ credit lawn lab risk ocean black"
+export AUDI_PUBLIC_KEY="0x7aeed77ed10108ead6c58dd45dd987aba28ea6e9cdf90f8893112c08bb0d4251"
+
+# BEEF Keys (BEEFY)
+export BEEF_SEED="industry flush stairs zoo world width dentist special life retire suffer myth"
+export BEEF_PUBLIC_KEY="0x020177ca58f45047c737e6e02adba1ac3520eb881ea38ad39751d32d7c89d5efaa"
+
+# Validator Configuration
+export VALIDATOR_NAME="Validator-beta-2"
+export RPC_PORT=9945
+export P2P_PORT=30334
+export WS_PORT=9945
+export PROMETHEUS_PORT=9616