docs(filesystem): document use_last_modified_version_strategy option for theme assets

[Basti (bneumann97)]

Summary

Add documentation for the newly added configuration that disables the last modified version strategy (check PR in shopware repo for more details)

Related links

shopware/shopware#18089

Checklist

• I reviewed affected links, code samples, and cross-references, including PageRef references where relevant.
• I added or updated redirects in .gitbook.yaml if pages were moved, renamed, or deleted.
• I updated .wordlist.txt (and sorted it) if spellcheck flags new legitimate terms.
• Any required dependent changes in downstream modules have already been merged and published.
• This pull request is ready for review.

Notes

[shopware-dev-docs-connector]

Developer Docs healthcheck

Status: Completed with success.
Repository: shopware/docs
Commit: 3c038cf
Preview: https://developer-documentation-16asr17y4-shopware-frontends.vercel.app
Workflow run: #4378

[Copilot]

Pull request overview

Adds documentation to the hosting/filesystem guide describing the new shopware.filesystem.theme.use_last_modified_version_strategy option, which can disable last-modified based URL versioning for theme assets on remote filesystems to reduce metadata/API calls.

Changes:

• Document how and when to disable the last-modified version strategy for theme assets (and why it helps on S3/GCS).
• Add GCS to the spellcheck wordlist.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
guides/hosting/infrastructure/filesystem.md	Documents the new theme filesystem config option to avoid last-modified lookups for asset URL versioning on remote storage.
.wordlist.txt	Adds GCS to avoid spellcheck failures for the new documentation text.

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[Micha Hobert (Isengo1989)]

Thanks for the PR Basti (@bneumann97) - will be merged when the connected PR is merged as well 👍