### Does this PR have any customer impact?
No
### Type (Feature, Refactoring, Bugfix, DevOps, Testing, Perf, etc)
Docs
### Does it involve schema level changes? (Table, Column, Index, UDF, etc level changes)
No
### Are you introducing any new config? If yes, do you have tests with and without them being set?
No
### Release Note (Refer [Template](../docs/release_notes/pgmongo_template.md))
### Description
This PR includes updates to add base Doxygen comments within SQL files, setting up initial documentation structure for functions. Additionally, it includes Doxygen configuration files (Doxyfile, etc.) tailored to support SQL file parsing and documentation generation.
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#### AI description (iteration 1)
#### PR Classification
Documentation
#### PR Summary
This pull request adds Doxygen comments to various `helio_api` functions to improve code documentation.
- Added Doxygen comments to functions in `sql/udfs/commands_crud/query_cursors_single_page--latest.sql`
- Added Doxygen comments to functions in `sql/udfs/utils/extension_version_utils--latest.sql`
- Added Doxygen comments to functions in `sql/udfs/auth/auth_scram--latest.sql`
- Added Doxygen comments to functions in `sql/udfs/commands_crud/delete--latest.sql`
- Added Doxygen comments to functions in `sql/udfs/schema_mgmt/create_collection_view--latest.sql`
### Does this PR have any customer impact?
No
### Type (Feature, Refactoring, Bugfix, DevOps, Testing, Perf, etc)
Refactoring
### Does it involve schema level changes? (Table, Column, Index, UDF, etc level changes)
Yes
### Are you introducing any new config? If yes, do you have tests with and without them being set?
No
### Release Note (Refer [Template](../docs/release_notes/pgmongo_template.md))
### Description
Porting udfs into documentdb
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#### AI description (iteration 1)
#### PR Classification
Code cleanup and feature enhancement.
#### PR Summary
This pull request continues the porting of UDFs into DocumentDB, updating and including various SQL files for better functionality and organization.
- Updated `documentdb--0.24-0.sql` to include new UDFs and operators, replacing old function references.
- Added new UDFs for query, projection, geospatial, aggregation, metadata, schema management, index management, CRUD commands, user management, schema validation, telemetry, TTL, vector search, extension version, diagnostic, and RBAC metadata.
- Removed outdated function definitions and replaced them with updated SQL includes.
### Does this PR have any customer impact?
No
### Type (Feature, Refactoring, Bugfix, DevOps, Testing, Perf, etc)
Refactoring
### Does it involve schema level changes? (Table, Column, Index, UDF, etc level changes)
Yes
### Are you introducing any new config? If yes, do you have tests with and without them being set?
No
### Release Note (Refer [Template](../docs/release_notes/pgmongo_template.md))
### Description
Move udf files from pg_helio_api -> pg_documentdb
----
#### AI description (iteration 1)
#### PR Classification
Code cleanup
#### PR Summary
This pull request moves User Defined Function (UDF) files from the `pg_helio_api` directory to the `pg_documentdb` directory.
- Updated `pgmongo/sql/pgmongo--1.23-0--1.24-0.sql` to include UDFs from `pg_documentdb` instead of `pg_helio_api`.
- Modified `oss/pg_helio_api/sql/pg_helio_api--1.15-0--1.16-0.sql` to reference UDFs from `pg_documentdb`.
- Adjusted `oss/pg_helio_api/sql/pg_helio_api--1.10-0.sql` to include UDFs from `pg_documentdb`.
- Updated `scripts/validate_helio_extension_state.sh` to add validation exceptions for the moved UDF files.
- Changed `pgmongo/sql/pgmongo--1.21-0--1.22-0.sql` to reference UDFs from `pg_documentdb`.
Vinod Sridharan
Sena Gungor
Zinan Ren