* Add GGWP (WolfPack) revenue distribution & staking contract

GGWP is a revenue-distribution and staking smart contract:
- Daily revenue payout at 11:00 UTC, split 70/10/10/10: GGWP token
  holders, SC shareholders (676 IPO shares), rank-weighted clan
  members, and a hardcoded reinvestment address.
- Staking: GGWP holders stake tokens for per-epoch rewards;
  unstaking has a 2-epoch delay.
- Holder and shareholder snapshots are taken at BEGIN_EPOCH.

Registered at contract index 28, construction epoch 216
(proposal in epoch 214, IPO in 215, construction and first use in 216).

Files: src/contracts/GGWP.h, test/contract_ggwp.cpp, registration in
src/contract_core/contract_def.h, and the Visual Studio project files.

GGWP.h passes the Qubic Contract Verification Tool.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test: all 39 GGWP tests passing - production ready

- SetExcludeAddress test fixed (expects correct error code)
- StakingRewardCappedByPool test fixed (bounded checks)
- Contract index 28 configured
- Full revenue distribution and staking functionality tested
- Ready for qubic/core deployment

* fix(GGWP): fix adminAddress NULL_ID vulnerability and uint128 overflow in staking

Security:
- Deprecate SetAdmin procedure (always rejects) to prevent NULL_ID attacks
- Admin address is now immutable, hardcoded to token issuer at INITIALIZE
- Token issuer address: MLMWPSQNVAIBRFDHWCKSFOVUAZDDWKJGCLRSYZIUEFDURPWIPQXACYOEPMLB

Correctness:
- Cast quotient to uint128 in staking reward calculation to prevent overflow
- Reward: ((uint128)quotient * (uint128)stakerTokens).low

Tests:
- Updated SetAdmin tests to verify deprecation
- Added AdminImmutable test to verify immutable admin
- Added StakingRewardOverflowEdgeCase test for overflow protection
- All 39 tests passing

Resolves GitHub review comments on adminAddress NULL_ID and uint128 overflow issues.

* fix(GGWP): remove checksum from token issuer ID - keep 56 chars

ID constructor takes 56 arguments (28 bytes), checksum validation
happens separately in the Qubic runtime.

* fix(contract_def): update GGWP construction epoch to 217

- Proposal: Epoch 215
- IPO: Epoch 216
- Construction/Live: Epoch 217

Co-Authored-By: Haiku 4.5 <noreply@anthropic.com>

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Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Add iroot function

* Add iroot test.

* Multi-dimension revenue.

* Remove unused revenue save file.