[FEATURE] Improve extension-from-scratch example with Get, Update, and Delete functionality

[dbwiddis]

Is your feature request related to a problem?

#603 requires documentation on developing an extension from scratch.

#610 documents the basic first steps and the C in CRUD. Additional functionality is needed.

Some bugs (e.g., #609) are being discovered in the process.

What solution would you like?

I've started work on this "from scratch" extension at my personal account here: https://github.com/dbwiddis/CRUDExtension which is documented in #610.

Whoever takes this issue can recreate their own extension from scratch following that documentation and:

• [ ] Identify any issues in the current documentation, and submit changes to improve it
• [ ] Implement one or more of the remaining handlers (see https://opensearch.org/docs/latest/clients/java/#sample-program ) for example code
• [ ] Implement other functionality with an extension.

What alternatives have you considered?

ChatGPT "Write me an OpenSearch Extension from scratch".

[kokibas]

Hello @dbwiddis ,I would like to take this issue

[dbwiddis]

Hi @kokibas, this is a rather broad issue with many things you can do. Which part of it will you be doing?

[kokibas]

Hi @kokibas, this is a rather broad issue with many things you can do. Which part of it will you be doing?

I will be implement remaining handlers