Feat embedded doc value

[jpschorr]

Issue #, if available:

Description of changes:

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 30.76923% with 63 lines in your changes missing coverage. Please review.

Project coverage is 80.27%. Comparing base (75ffa06) to head (ea4cd80).

Files with missing lines	Patch %	Lines
partiql-ast/src/pretty.rs	3.70%	26 Missing ⚠️
partiql-value/src/embedded_doc.rs	27.58%	21 Missing ⚠️
extension/partiql-extension-ion/src/lib.rs	0.00%	7 Missing ⚠️
partiql-common/src/embedded_document.rs	66.66%	4 Missing ⚠️
partiql-logical-planner/src/lower.rs	80.00%	1 Missing and 1 partial ⚠️
extension/partiql-extension-ion/src/encode.rs	0.00%	1 Missing ⚠️
...sion/partiql-extension-visualize/src/ast_to_dot.rs	0.00%	1 Missing ⚠️
partiql-value/src/pretty.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           dev-ion-doc     #514      +/-   ##
===============================================
- Coverage        80.70%   80.27%   -0.44%     
===============================================
  Files               88       90       +2     
  Lines            19409    19496      +87     
  Branches         19409    19496      +87     
===============================================
- Hits             15665    15651      -14     
- Misses            3324     3410      +86     
- Partials           420      435      +15     

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[github-actions]

Conformance comparison report

	Base (75ffa06)	1fa2589	+/-
% Passing	86.98%	84.71%	-2.27%
✅ Passing	5564	5446	-118
❌ Failing	833	983	150
🔶 Ignored	0	0	0
Total Tests	6397	6429	32

Number passing in both: 5375

Number failing in both: 789

Number passing in Base (75ffa06) but now fail: 10

Number failing in Base (75ffa06) but now pass: 10

⁉️ CONFORMANCE REPORT REGRESSION DETECTED ⁉️. The following test(s) were previously passing but now fail:

Click here to see

• partiql_tests::fail::static_analysis::primitives::primitives::functions::lower::invalid_function_args::lower::lower_wrong_type_of_arguments_param
• partiql_tests::eval::query::select::select::select::select_distinct::permissive_selectdistinctexpression
• partiql_tests::fail::static_analysis::primitives::primitives::functions::upper::invalid_function_args::upper::upper_wrong_type_of_arguments_param
• partiql_tests::fail::static_analysis::primitives::primitives::functions::char_length::invalid_function_args::char_length::char_length_wrong_types_in_
• partiql_tests::eval::query::select::select::select::select_distinct::strict_selectdistinctexpression
• partiql_tests::eval::primitives::functions::functions::exists::exists::permissive_exists_valid_cases_param_a_1_result_true
• partiql_tests::fail::static_analysis::primitives::primitives::functions::char_length::invalid_function_args::char_length::character_length_wrong_types_in_
• partiql_tests::eval::primitives::functions::functions::exists::exists::permissive_exists_valid_cases_param_a_null_result_true
• partiql_tests::eval::primitives::functions::functions::exists::exists::strict_exists_valid_cases_param_a_null_result_true
• partiql_tests::eval::primitives::functions::functions::exists::exists::strict_exists_valid_cases_param_a_1_result_true

The following test(s) were previously failing but now pass. Before merging, confirm they are intended to pass:

Click here to see

• partiql_tests::eval::primitives::functions::functions::exists::exists::strict_exists_valid_cases_param_1_result_true_
• partiql_tests::eval::primitives::functions::functions::exists::exists::strict_exists_valid_cases_param_missing_result_true_
• partiql_tests::eval::primitives::functions::functions::exists::exists::permissive_exists_valid_cases_param_null_result_true_
• partiql_tests::eval::primitives::functions::functions::exists::exists::permissive_exists_valid_cases_param_result_false_
• partiql_tests::eval::primitives::functions::functions::exists::exists::permissive_exists_valid_cases_param_missing_result_true_
• partiql_tests::eval::primitives::functions::functions::exists::exists::strict_exists_valid_cases_param_null_result_true_
• partiql_tests::fail::static_analysis::primitives::primitives::operator::is_operator::is_not_operator_expects_type_name
• partiql_tests::eval::primitives::functions::functions::exists::exists::permissive_exists_valid_cases_param_1_result_true_
• partiql_tests::eval::primitives::functions::functions::exists::exists::strict_exists_valid_cases_param_result_false_
• partiql_tests::fail::static_analysis::primitives::primitives::operator::is_operator::is_operator_expects_type_name