feat(examples): FunctionModifiers, Smart Contract Wallet Package

[Ursulovic]

FunctionModifiers and Smart Contract Wallet Package

FunctionModifiers Package

A general-purpose package for managing access control and conditional logic in smart contracts. It handles:

• Ownership: Multi-owner setups with approval thresholds.
• Approvals: Ensures actions need consensus before execution.
• Proposals: Tracks and manages changes like adding owners or updating rules.

---

SmartContractWallet Package

A wallet system built on FunctionModifiers for managing coins and tokens. Features:

• Multi-Owner Control: Requires approvals for withdrawals.
• Proposals: Owners propose and approve transactions.
• Secure Transactions: Ensures funds move only with consensus.

---

This PR also contains 2 demo realms:

1. modifierdemo: Wrapper functions for testing FunctionModifiers package.
2. smartcontractwalletdemo: Wrapper functions for testing SmartContractWallet package.

These demo realms are intended for testing and will be removed in the final commit.

---

Functionalities

FunctionModifiers Package

• Implement ownership management functions
• Implement registering modifiers
• Implement editing modifiers
• Implement approving modifiers
• Implement AssertIsApproved function
• Write tests

SmartContractWallet Package

• Implement managing coins
• Implement managing GRC20 tokens
• Implement tests

Possible improvements

• Implement event logging

[Gno2D2]

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[leohhhn]

Need an example realm of how this is used - when you make it, you'll see this implementation doesn't work :)

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All modified and coverable lines are covered by tests ✅

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[leohhhn]

Please add tests; I will review the rest after that.