v2.0.0

This update adds support for a wider range of physical states and operations.

What's Changed

• Added the Pauli String and Pauli Time Evolution gates to the circuit-builder and circuit! macro.
• Added the equals_without_phase method to state to check phase-independent equality.
• Added a method to normalise states.
• Added Display trait implementations on all operators.
• Added the deep_clone method to parameter.
• Added new constructors for Hartree-Fock, GHZ, and Bell states.
• Added a method to apply the normalised version of a Pauli String.
• Added methods to calculate the Fubini-Study distance and fidelity metrics to state.
• Increased test coverage for Pauli Strings.
• Added a method to get the length of Pauli Strings.
• Added a method to convert Pauli operators to Pauli Strings.

Bug Fixes

• Fixed Clippy lints
• Added all missing examples to the cargo.toml file.

Potentially Breaking Changes

• Changed the Operator trait to require the Display trait.
• Changed operator addition methods on Pauli Strings to panic if an operator is added to a duplicate qubit.

Full Changelog: v1.4.2...v2.0.0