Implement JSON array to type conversion with refactoring the previous implementation

[dulajdilshan]

Purpose

1. Implement correct behaviour of JSON converted to types

previously our behaviour was:

According to new implementation the behaviour is:

2. Refactor previous implementation

• Use lightweight data objects for evaluation and data parsing purpose (Previously we used SyntaxTree nodes)
• Convert directly data objects to type-data without applying to the syntax tree and re-create.

Goals

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Approach

Pending..

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[dulajdilshan]

Closing this hence ballerina-platform/ballerina-language-server#9