ci(docs): rename docs preview workflows for clarity

Rename `preview-stable-docs.yml` to `docs-preview-pr.yml` (the file covered both main and stable PRs since #2992, so the old name was misleading) and `refresh-main-docs-preview.yml` to `docs-preview-main.yml`. Both now share the `docs-preview-` prefix so they sort together in the Actions UI, with display names "📖 Docs preview (PR)" and "📖 Docs preview (main)". Production promotion stays as a step inside release-stable.yml since it's gated on the orchestrator's `promote_sha` output and benefits from sharing a job with the release steps.

Author: caio-pizzol

…/workflows/refresh-main-docs-preview.yml .github/workflows/docs-preview-main.yml.github/workflows/refresh-main-docs-preview.yml renamed to .github/workflows/docs-preview-main.yml .github/workflows/refresh-main-docs-preview.yml renamed to .github/workflows/docs-preview-main.yml

@@ -3,7 +3,7 @@
 # opening a draft PR. Mintlify reuses the URL per branch, so each push
 # refreshes content in place. Production docs stay on docs-stable; this is
 # unrelated to the production gate.
-name: 👀 Refresh main docs preview
+name: 📖 Docs preview (main)
 
 on:
   push:

.github/workflows/preview-stable-docs.yml .github/workflows/docs-preview-pr.yml.github/workflows/preview-stable-docs.yml renamed to .github/workflows/docs-preview-pr.yml

@@ -5,7 +5,7 @@
 # Mintlify's automatic previews only fire on PRs targeting the deployment
 # branch (`docs-stable`). Path filter keeps the 5 req/min Mintlify API quota
 # from being spent on unrelated code PRs.
-name: 👀 Preview docs for main and stable PRs
+name: 📖 Docs preview (PR)
 
 on:
   pull_request: