chore: Refactor to solve smells

[Siva-2707]

Resolved some Implementations smells

SM_Method.java

• parse() method was a Complex Method, so have extracted the code into various methods.

TypeInfo.java

• Magic number (2) was used. Introduced a variable COMMA_LENGTH to give more understanding of the usage.

ImplementationSmellDetector.java

• ABSTRACT_FUMCTION_CALL_FROM_CONSTRUCTOR was a very long variable name causing Long Identifier smell. I have changed that to ABST_FUNC_CALL_FRM_CTOR. Which makes it short and understandable.

[Siva-2707]

• Resolved one Rebellious Hierarchy smell by introducing a Parsable interface.

• Resolved Insufficient modularization smell in TypeMetrics class by moving the methods to a different class (TypeMetricsExtractor)

• Resolved Broken Hierarchy smell. TypeMetics was extending MetricsExtrator) This was breaking is-a relationship which was causing the Broken Hierachy smell. Introduced a new class Metrics to resolve that. And moved the extraction method to the corresponding class.