feat(jmespath): add abstract syntax tree definition

[dreamorosi]

Description of your changes

This PR introduces the definition of the components that make up the Abstract Syntax Tree (AST) for the JMESPath utility.

As discussed in the linked utility the AST is a hierarchical representation of the syntactic structure of a JMESPath expression and abstracts away from the specifics of the input text, capturing the components and relationships between them.

Each node in the AST follows a similar structure and is composed by three fields:

• type a string literal holding the name of the node (i.e. comparator, field, filter_projection, etc.)
• children an array containing the child nodes of this node (if any) - this helps establish the hierarchy
• value the value of the node (i.e. any JSON serializable value)

Related issues, RFCs

Issue number: #2210

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my change is effective and works
• The PR title follows the conventional commit semantics

Breaking change checklist

Is it a breaking change?: NO

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
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0.0% Duplication on New Code

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