Add type to ast::Lit::EmbeddedDocLit

[jpschorr]

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Attention: Patch coverage is 6.89655% with 27 lines in your changes missing coverage. Please review.

Project coverage is 80.65%. Comparing base (d07a7e1) to head (4de6533).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
partiql-ast/src/pretty.rs	3.70%	26 Missing ⚠️
...sion/partiql-extension-visualize/src/ast_to_dot.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #525      +/-   ##
==========================================
- Coverage   80.75%   80.65%   -0.11%     
==========================================
  Files          89       89              
  Lines       19593    19618      +25     
  Branches    19593    19618      +25     
==========================================
  Hits        15822    15822              
- Misses       3352     3377      +25     
  Partials      419      419              

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[github-actions]

Conformance comparison report

	Base (d07a7e1)	a310ffa	+/-
% Passing	86.90%	86.90%	0.00%
✅ Passing	5587	5587	0
❌ Failing	842	842	0
🔶 Ignored	0	0	0
Total Tests	6429	6429	0

Number passing in both: 5587

Number failing in both: 842

Number passing in Base (d07a7e1) but now fail: 0

Number failing in Base (d07a7e1) but now pass: 0

[alancai98]

Should the type argument be used in the following line rather than the hard-coded Ion?

[jpschorr]

Eventually, but there's not enough in place to do so meaningfully in the PR. This will be the extension mechanism for boxed documents. For now, only Ion is supported.