[integer] Enhance the comparison operations of BigInt

[forfudan]

This pull request includes significant changes to the BigInt and BigUInt benchmarks and arithmetic operations. The changes improve the initialization and handling of BigInt objects, update the benchmarks to use more descriptive commands, and enhance the comparison operations. Below are the most important changes:

Benchmark Improvements:

• benches/bigint/bench.mojo: Added the import for bench_bigint_multiply and updated the command options to use descriptive strings instead of numbers. [1] [2]
• benches/biguint/bench.mojo: Updated the command options to use descriptive strings instead of numbers.

BigInt Initialization and Arithmetic Enhancements:

• src/decimojo/bigint/arithmetics.mojo: Replaced the empty and capacity parameters with List[UInt32] for initializing BigInt objects in various arithmetic functions. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

BigInt Struct Enhancements:

• src/decimojo/bigint/bigint.mojo: Deprecated the empty and capacity parameters in BigInt initialization, introduced new constructors for safer initialization from lists and words, and added comparison dunders (__gt__, __ge__, __lt__, __le__, __eq__, __ne__). [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

Comparison Module Update:

• src/decimojo/bigint/comparison.mojo: Removed unnecessary import and added the import for BigUInt.