Changes:
- Moved the files for four pages (linux-management, basic-comparison,
deployment, and gitops-workshop) out of the landing pages folder.
- Added policies for the moved pages
- Updated the URLs for pages in the landing pages folder to be prefixed
with /lp/, and added redirects that preserve query strings when
redirecting users.
- Created a section in the routes configuration for landing pages
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## Summary by CodeRabbit
* **New Features**
* Implemented /lp/* landing-page paths with 301 redirects from legacy
URLs (query strings preserved).
* Added public access exceptions so selected marketing pages are
reachable without login.
* **Refactor**
* Reorganized routing and page templates to move several pages out of
the previous landing-pages area into dedicated page paths.
* Updated included page scripts and style imports to match the
reorganized pages.
<!-- review_stack_entry_start -->
[](https://app.coderabbit.ai/change-stack/fleetdm/fleet/pull/45632)
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<!-- end of auto-generated comment: release notes by coderabbit.ai -->
