feat: implement #307 excessive contract size detection and #310 hardc…

[Cybermaxi7]

…oded address detection

Issue #307 - Detect Excessive Contract Size

• Add packages/rules/src/optimization/deployment/excessive_contract_size.rs
  • ExcessiveContractSizeRule implements the Rule trait
  • Estimates bytecode size via AST token count heuristic (2 bytes/token)
  • Warns at 75% of EVM EIP-170 limit (24,576 bytes) with ViolationSeverity::Warning
  • Flags at 100% with ViolationSeverity::Critical
  • Exposes estimate_bytecode_size() helper for dashboards/callers
  • Full unit test coverage: small contract, size growth, threshold ordering, critical violation on oversized contract
• Add packages/rules/src/optimization/deployment/mod.rs (module + re-exports)
• Update packages/rules/src/optimization/mod.rs to declare and re-export the new deployment sub-module

Issue #310 - Detect Hardcoded Addresses

• Add packages/rules/src/security/configuration/hardcoded_addresses.rs
  • HardcodedAddressesRule implements the Rule trait
  • Detects 20-byte Ethereum-style addresses (0x + 40 hex chars) via regex
  • Negative lookahead prevents false-positive matches on longer hashes
  • Deduplicates repeated occurrences of the same address across items
  • Suggests moving addresses to constructor args or config registry
  • Full unit test coverage: const, let binding, function body, short hex, long hash, deduplication, multiple distinct addresses, severity check
• Add packages/rules/src/security/configuration/mod.rs
• Add packages/rules/src/security/mod.rs (new top-level security module)
• Update packages/rules/src/lib.rs to declare pub mod security and re-export ExcessiveContractSizeRule and HardcodedAddressesRule

Closes #307
Closes #310

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