feat: canonicalize based on ClassModel

[algomaster99]

Here we attempt to canonicalize bytecode using java.lang.classfile.ClassModel. Approach:

1. First establish the correct order of constant pool - we let the depth first search visitor provided decide that.
2. Then we changes indices of all the constant pool entries and then classfile sections where the entry is referred.

[algomaster99]

There are some constant pool entries that are not in the AST. For example, SourceFile attribute's name is also in the constant pool. To infer its index, we will have to refer to the exact position in the byte array which java.lang.classfile API should provide.

[algomaster99]

payloadStart is the index where u1 info[attribute_length]; starts. If we go 6 indices before payloadStart, we can get exact index of SourceFile.