Fix `in` array query and documentation stuff

[shivasurya]

• Added support for variety of operators in check conditions. (such as !=, ==, >, <, in, like)
• Added support for && and \|\| operators in check conditions.
• Migrated all entity types to methods. (such as getVisibility())
• Introduced Alias for entity types. (such as method_declaration AS md WHERE md.get_visibility())

closes #26 and introduced methods

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 54.44015% with 118 lines in your changes missing coverage. Please review.

Project coverage is 52.65%. Comparing base (6606f6c) to head (3ef69cd).

Files	Patch %	Lines
sourcecode-parser/antlr/query_parser.go	34.44%	114 Missing and 4 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #85 +/- ## ========================================== - Coverage 54.35% 52.65% -1.71% ========================================== Files 9 9 Lines 2112 2203 +91 ========================================== + Hits 1148 1160 +12 - Misses 900 978 +78 - Partials 64 65 +1 ```

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