refactor(challenge-02): isolate functionalities into multiple isolated modules

[priyanshsao]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 65.78947% with 78 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
challenge-02/internal/parser/parser.go	70.32%	18 Missing and 9 partials ⚠️
challenge-02/cmd/main.go	0.00%	21 Missing ⚠️
challenge-02/internal/define/tokens.go	20.00%	15 Missing and 1 partial ⚠️
challenge-02/internal/lexer/lexer.go	86.36%	11 Missing and 1 partial ⚠️
challenge-02/json/factory.go	0.00%	2 Missing ⚠️

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