docs: keep Newport evaluation internal, out of the public docs site

Move the evaluation (md + pdf) from docs/developer to vendor_docs/newport_xps
and drop the zensical nav entry; docs/ is published on readthedocs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01M8zoDvpeC2s153trRfq32w

vendor_docs/newport_xps/README.md

@@ -13,4 +13,4 @@ kept for implementing the BEC device for the XPS-RLD4. Excluded from the wheel (
 | XPS_PSO_Multi-Axis_User_Guide.pdf | Multi-axis position synchronized output |
 | TechNote_Trigger_Synchronization_XPS.pdf | Trigger synchronization |
 
-Evaluation: `docs/developer/newport_sastt_evaluation.md`.
+Evaluation: `newport_sastt_evaluation.md` / `.pdf` in this folder. Internal only, not part of the public docs site (`docs/`).

vendor_docs/newport_xps/newport_sastt_evaluation.md

@@ -52,7 +52,7 @@ sync input 1? 3. DRV11 support for OWIS/Steinmeyer steppers? 4. Side mounting of
 
 ## Vendor documents
 
-Controller (for coding), in the repo: `vendor_docs/newport_xps/` - XPS Unified Programmer's Manual, XPS-D Features
+Controller (for coding), in this folder (`vendor_docs/newport_xps/`) - XPS Unified Programmer's Manual, XPS-D Features
 (EDH0407) and Configuration (EDH0406) manuals, XPS-RLD Start-Up Manual (EDH0420) and datasheet, PSO multi-axis
 guide, trigger synchronization tech note. Stage, driver and cable documents (ILS-LM-S, VP-5ZA, driver cards, cable
 kits, UI manual): not in git, `~/Downloads/newport_xps_cart/` on the workstation of M. Holler. Source:

zensical.toml

@@ -50,7 +50,6 @@ nav = [
     { "PandaBox free-running setup" = "developer/panda_box_free_running_setup.md" },
     { "PandaBox data schema" = "developer/panda_box_free_running_data_schema.md" },
     { "Aerotech stages: design and triggering" = "developer/aerotech_stages.md" },
-    { "Newport XPS + ILS evaluation (SAXS-TT)" = "developer/newport_sastt_evaluation.md" },
   ] },
 ]