fix/feat: add fix for multi-hop buys and contract migration system

[gorgos]

• Added Changelog and rust-toolchain file
• Added contract migration templates and migrate function
• Correctly round to min_quantity_tick_size in intermediate steps for multi-hop buys

Summary by CodeRabbit

• New Features
  • Introduced a Changelog file for tracking notable project changes.
  • Added contract migration templates and a migrate function for seamless updates.
  • Implemented a validation step in contract administration for enhanced data integrity.
  • Updated logic for rounding to min_quantity_tick_size in multi-hop buys for market compliance.
• Bug Fixes
  • Corrected the spelling in an error message for unrecognized reply IDs.
• Documentation
  • Updated error documentation to include a new variant for migration errors.
• Refactor
  • Enhanced contract versioning and configuration migration handling.
  • Improved logic in estimating execution buy from target by aligning quantities with market tick size requirements.
• Tests
  • Expanded integration tests to include realistic market scenarios and contract migration tests.

[maxrobot]

See comments just version stuff

[maxrobot]

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[coderabbitai]

Review Status

Actionable comments generated: 0

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Commits

Files that changed from the base of the PR and between 9a0b624 and c827e7f.

Files ignored due to path filters (2)

• Cargo.lock is excluded by: !**/*.lock
• contracts/swap/Cargo.toml is excluded by: !**/*.toml

Files selected for processing (1)

• contracts/swap/src/contract.rs (3 hunks)

Files skipped from review as they are similar to previous changes (1)

• contracts/swap/src/contract.rs