ICU-22722 Revised ICU4J API doc process to modern tools

[sven-oly]

Add how to use release_tools/github_release.sh.

Also detailed how to update the files in icu-docs/apidoc

Checklist

• Required: Issue filed: https://unicode-org.atlassian.net/browse/ICU-22722
• Required: The PR title must be prefixed with a JIRA Issue number.
• Required: The PR description must include the link to the Jira Issue, for example by completing the URL in the first checklist item
• Required: Each commit message must be prefixed with a JIRA Issue number.
• Issue accepted (done by Technical Committee after discussion)
• Tests included, if applicable
• API docs and/or User Guide docs changed or added, if applicable

[markusicu]

This goes into "main" which is now for 76, so you can't use the 75 BRS ticket.

Please use
ICU 76 ticket: docs minor fixes: typos/etc./version updates / User Guide & API docs: ICU-22722

[jira-pull-request-webhook]

Hooray! The files in the branch are the same across the force-push. 😃

~ Your Friendly Jira-GitHub PR Checker Bot

[echeran]

Typo?

Suggested change

	* Copy the fulljavadoc.jar to the to icu-docs/apidoc directory, either dev (for release candidates) or released (for public distribution).
	* Copy the full javadoc.jar to the to icu-docs/apidoc directory, either dev (for release candidates) or released (for public distribution).

[sven-oly]

No, the file is actually called "icu4j-75_1-fulljavadoc.jar". There's another file "icu4j-75_1-javadoc.jar" which is not the one to use.

[sven-oly]

No, there are 2 javadoc files, icu4j-75_1-javadoc.jar and icu4j-75_1-fulljavadoc.jar. The "full" one is what should be used.

[mihnita]

Might be best to document it as icu4j-<version>-fulljavadoc.jar then.
I think it would avoid confusion.

---

In the longer run I think that creating jar + unzipped folder should be done by the script.
No reason to do it by hand.

[jira-pull-request-webhook]

Hooray! The files in the branch are the same across the force-push. 😃

~ Your Friendly Jira-GitHub PR Checker Bot