docs: move community presets table to docs site, add missing entries (#2341)

* docs: move community presets table to docs site, add missing entries

- Move the full community presets table from README.md to the docs site
  at docs/community/presets.md, replacing the README section with a
  short link (matching the pattern used for Walkthroughs and Friends).
- Add missing Jira Issue Tracking and Screenwriting rows to the docs
  table so it reflects all entries in catalog.community.json.

* docs(presets): add docs site table step to publishing guide

Add step to update docs/community/presets.md when submitting a
community preset, and add corresponding PR checklist item. Matches
the pattern used in the extensions publishing guide.

* Clarify alphabetical sort key in presets publishing guide

Specify that the docs table should be sorted by preset name (the first
column), disambiguating from the catalog JSON which sorts by preset ID.

* Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

* Address review: fix provides count, admonition style, example row

- Add missing scripts count to Fiction Book Writing table row to match catalog
- Switch README disclaimer to GitHub admonition format for consistency
- Include optional scripts count in PUBLISHING.md example row

* Fix Fiction Book Writing link text to match actual repo name

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