HHH-18966 update user guide mysql spatial function support

[songhaechan]

This PR updates the documentation to reflect the availability of several MySQL Spatial Functions based on both the official documentation (MySQL Spatial Relation Functions and MySQL Spatial Operator Functions) and personal testing. Specifically, the following functions are confirmed to be available:

ST_Distance
ST_Buffer
ST_ConvexHull
ST_Intersection
ST_Difference
ST_SymDifference

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and can be relicensed under the terms of the LGPL v2.1 license in the future at the maintainers' discretion.
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https://hibernate.atlassian.net/browse/HHH-18966

[songhaechan]

@beikov I've had to resend the PR due to some issues with the previous one. I would appreciate it if you could review it again.
Additionally, InnoDB has now improved GIS support and provides geometry types, which led to the deprecation of MySQLSpatial56Dialect, and it has been removed from the documentation. And I updated MySQL document link.
Thank you!

[beikov]

Thanks for the PR

[songhaechan]

@beikov
I'm not sure why, but it looks like my PR hasn't been reflected on the official documentation site.
Do I need to submit an additional PR to build the documentation, or is this handled automatically? If I need to build the documentation myself, could you guide me on the correct process?
Thanks for helping out a newbie! 😊

[beikov]

Your PR was merged in the main branch, which is currently for ORM 7.0. As soon as the next release of ORM 7.0 is published, you will see the changes in the current documentation.

To view the nightly documentation, see https://ci.hibernate.org/view/ORM/job/hibernate-orm-main-nightly-docs/doclinks/3/

[songhaechan]

Got it! Thanks for the clarification and for pointing me to the nightly docs.