Add Built-In Way to Join Array Items with a Separator

In WordPress, it's very common to display a list of taxonomy terms (like categories or tags) for a post, formatted like:

Categories: Design, UI, Inspiration

Each term is optionally linked to its archive page, and the list is comma-separated.

In Clutch, if you're querying WordPress terms via a wp:post.categories or wp:post.tags field and looping through them in a repeater or component, you currently get a list of nodes, but you can't easily insert commas between them, because:

You can't conditionally render a comma unless you know it’s not the last item
There’s no built-in helper (like join(", ") for rendering JSX or string templates)
Users are resorting to CSS tricks like adding a comma via ::after on every .term except the last one

This works visually, but it’s a hack — it doesn’t help screen readers, and it makes linking the terms more complicated.

✅ How to Reproduce in Clutch

Create a WordPress post with multiple categories or tags.
Use the Clutch WordPress integration to fetch the terms (e.g. wp:post.categories).
render them using loop > text bind
Notice: There’s no comma between them, and no way to insert one except using CSS pseudo-selectors or hacking around it.

🐞 Feature Request / Bug Report

Title: No Easy Way to Render Comma-Separated Term Names (Linked or Unlinked)

Issue:
There’s currently no built-in or clean way in Clutch to render a list of taxonomy terms (e.g., categories or tags) as a comma-separated list — especially when the terms are linked.

This is a very common pattern in WordPress theming (e.g. “Design, UI, Inspiration”), but Clutch users have to resort to fragile CSS pseudo-selectors (:not(:last-child)::after) or hand-written conditional logic.

✅ Steps to Reproduce

Query WordPress terms (e.g., wp:post.categories) in a post card
Map them into a component like TextLink
Try to insert commas between them
Discover there is no built-in helper or join-style control

⚠️ Impact

Breaks a very common WP pattern
Poor accessibility with CSS-only workarounds
Leads to inconsistent styling or hard-to-maintain markup