integration-docs: Update the SVN integration doc.

[Niloth-p]

Pre-requisite PR zulip/zulip#36240 adds the macro install-requirements.md that this doc uses.

Screenshots

SVN doc link

Self-review checklist

• Self-reviewed the changes for clarity and maintainability
  (variable names, code reuse, readability, etc.).

Communicate decisions, questions, and potential concerns.

• Explains differences from previous plans (e.g., issue description).
• Highlights technical choices and bugs encountered.
• Calls out remaining decisions and concerns.
• Automated tests verify logic where appropriate.

Individual commits are ready for review (see commit discipline).

• Each commit is a coherent idea.
• Commit message(s) explain reasoning and motivation for changes.

Completed manual review and testing of the following:

• Visual appearance of the changes.
• Responsiveness and internationalization.
• Strings and tooltips.
• End-to-end functionality of buttons, interactions and flows.
• Corner cases, error conditions, and easily imagined bugs.

[laurynmm]

@Niloth-p - Thanks for updating this doc! Overall, these updates look good. Posted a few review comments; let me know if you have any questions!

[Niloth-p]

Thank you for the review! Updated as recommended.
I've not made any changes related to the existence of the target channel, as I'm unsure how to proceed.
I've switched to using backticks instead of double quotes for channel names, and added the prefix # in front of channel names (because that's the convention in the Help docs - example), based on your review comment on another doc PR.

Screenshot

[Niloth-p]

I've switched to using bold formatting instead of backticks for channel names.

Screenshot

[alya]

The screenshot looks like really outdated Zulip UI.

[alya]

@laurynmm Do you have any further feedback?

[Niloth-p]

The screenshot looks like really outdated Zulip UI.

That should now be updated by the example screenshots PR that was merged yesterday. 😄

However, I just noticed that this actually requires a prior PR that adds the macro install-requirements.md in the other repo; I'll have to check if it's included in another PR, and link it as a prerequisite.

[laurynmm]

After reading over the updates, my only question is do we want to link to the Subversion project anywhere? Either in the main description or in a Related documentation section? Or both?

[Niloth-p]

Added a Related documentation section with a link to post-commit Repository Hook

We could replace the macro that requires a prerequisite PR to be merged in the other repo, with the text to get this PR merged immediately. And later apply the macro to all the affected integrations. Let me know.

Screenshot

[laurynmm]

Okay. I think the macro question has been dealt with since zulip/zulip#36240 was merged to the zulip/zulip repo. So, this should be good for integration review with @timabbott.

[timabbott]

Merged, thanks @Niloth-p!