feat: add Erc1155Holder contract + use type aliases for FixedBytes<N>

[bidzyyys]

Resolves #363

PR Checklist

• Tests
• Documentation
• Changelog

[netlify]

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🔨 Latest commit	6d82d84
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[codecov]

Codecov Report

Attention: Patch coverage is 92.45283% with 8 lines in your changes missing coverage. Please review.

Project coverage is 86.1%. Comparing base (8d1c883) to head (6d82d84).
Report is 1 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
contracts/src/token/erc20/extensions/permit.rs	0.0%	4 Missing ⚠️
contracts/src/token/erc1155/mod.rs	66.6%	1 Missing ⚠️
contracts/src/token/erc20/extensions/erc4626.rs	50.0%	1 Missing ⚠️
contracts/src/token/erc20/extensions/wrapper.rs	50.0%	1 Missing ⚠️
contracts/src/token/erc721/extensions/wrapper.rs	66.6%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
contracts-proc/src/interface_id.rs	90.6% <100.0%> (ø)
contracts-proc/src/lib.rs	100.0% <ø> (ø)
...tracts/src/access/control/extensions/enumerable.rs	92.0% <100.0%> (ø)
contracts/src/access/control/mod.rs	98.6% <100.0%> (ø)
contracts/src/access/ownable.rs	89.1% <100.0%> (ø)
contracts/src/access/ownable_two_step.rs	100.0% <100.0%> (ø)
contracts/src/finance/vesting_wallet.rs	57.2% <100.0%> (ø)
contracts/src/token/common/erc2981.rs	99.1% <100.0%> (ø)
...racts/src/token/erc1155/extensions/metadata_uri.rs	100.0% <100.0%> (ø)
contracts/src/token/erc1155/extensions/supply.rs	81.7% <100.0%> (ø)
... and 16 more

[0xNeshi]

Nice!

[qalisander]

Good job!