* Disable LEGACY_REPO_DIR with feature flag

Enabling DSTACK_FF_LEGACY_REPO_DIR_DISABLED does the following:
- Changes `working_dir` default value from `/workflow` to
  the image's working dir, unless the client is older than 0.19.27,
  in which case `/workflow` is still used.
- Forbids relative `working_dir` (client side only).
- Makes `repos[].path` required, unless the client is older than
  0.19.27, in which case `/workflow` is still used

Part-of: #3124

* Use $DSTACK_WORKING_DIR in IDE link

RunSpec.repo_dir = None is valid if there are no repos in the
configuration

* Add sglang_router details in examples, gateway and refs

* [Docs] Improve the `sglang` router configuration with gateways

---------

Co-authored-by: Bihan  Rana <[email protected]>
Co-authored-by: peterschmidt85 <[email protected]>

* [Docs] Add llms.txt and llms-full.txt #3311

* [Docs] Add llms.txt and llms-full.txt #3311

Review fix

* WIP: Support lazy max_offers for get_offers_by_requirements

* Implement get_offers iterator for ComputeWithAllOffersCached

* Refetch backend offers without limit to return all offers for the optimal fleet

* Drop tensordock compute

* Update get_offers() signatures

* Fix get_backend_offers()

* Replace yield with iter for LocalCompute

* Fix var capture by generator expression

* Fix exclude_not_available ignored

* Drop tensordock configurator import

* [Docs] Generate external links CSS decoration automatically (without manual hardcoded HTML)

* [Docs] Bugfix

…3323)

* [Blog] SGLang router integration and disaggregated inference roadmap

* [Blog] SGLang router integration and disaggregated inference roadmap

* Add test_deletes_user_with_resources

* Return 400 if deleting non-existent users

* Implement users soft-delete

* Fix deleting users with long names

* Fix deleting projects with long names

* Delete members when soft-deleting users

* Forbid deleting admin user via api

* Fix server_default

Added multi-node replicas to roadmap