blog: add closure table blog post 📰

[shivasurya]

Description:

This pull request adds a new blog post to the documentation, focusing on the use of closure tables for hierarchical queries in source code parsing. The post includes practical examples and pseudocode to illustrate the concept.

Key changes include:

• docs/src/content/docs/blog/code-pathfinder-closure-table-hierarchical-queries.mdx: Added a new blog post titled "Closure Tables - Deconstructing Code Hierarchies" by @sshivasurya, including an introduction to closure tables, comparisons with other hierarchical models, and a detailed example with pseudocode.

Checklist:

• Tests passing (gradle testGo)?
• Lint passing (golangci-lint run this requires golangci-lint)?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.30%. Comparing base (17b5623) to head (7efebfa).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #196   +/-   ##
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  Coverage   72.30%   72.30%           
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  Files          16       16           
  Lines        2473     2473           
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  Hits         1788     1788           
  Misses        641      641           
  Partials       44       44           

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