introduced snippet tag in ohm

[shoplando]

What are you adding in this PR?

Solves issue #830
This PR adds support for the snippet Liquid tag to the Liquid HTML parser. The implementation includes:

• Adding the snippet tag to the grammar in liquid-html.ohm
• Creating the necessary types and interfaces in the CST and AST stages
• Adding test cases to verify parsing of snippet blocks with HTML content

The snippet tag allows for reusable content blocks similar to the capture tag, with the syntax:

{% snippet variable_name %}
  <content>
{% endsnippet %}

What's next? Any followup issues?

• Add documentation link for the snippet tag once available

What did you learn?

Working with block-level Liquid tags requires updates across multiple layers of the parser, from grammar definition to AST transformation and formatting.

Before you deploy

• I included a minor bump changeset
• My feature is backward compatible

[shoplando]

• introduced snippet tag in ohm #1063 : 2 dependent PRs (#1069 , #1071 ) 👈 (View in Graphite)
• main

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[charlespwd]

Beautiful 👌

[aswamy]

Small comments, but makes sense! Good stuff 👏

[karreiro]

Thank you for this PR, @shoplando! As soon as we fix that minor issue in the unit test, I believe we will be ready to merge 🚀 :)

[shoplando]

Merge activity

• Oct 14, 1:52 PM UTC: A user started a stack merge that includes this pull request via Graphite.
• Oct 14, 1:53 PM UTC: @shoplando merged this pull request with Graphite.