Merge master: add cli_export, pdf_links; EDZ: 10-slot grid, group headers, ToS notice

- Resolve cmake/qet_compilation_vars.cmake conflict: keep both upstream's
  cli_export.cpp/h and pdf_links.cpp/h and the EDZ source additions.

- 10-position grid alignment: pin_y values are multiples of 10 so terminals
  snap cleanly to QET's default grid.  group_gap raised to 10 (one full slot).

- Named connector groups get a header label (group name) placed in the gap
  above the first pin, so the electrician sees block names (XDI, XPOW, …)
  without reading individual terminal designations.

- Device-tag dynamic_text now uses 9pt LABEL_FONT and y = min_y - 9 so it
  clears the element body and is legible at normal zoom.

- Add EPLAN Data Portal Terms of Use disclaimer to sources/import/edz/README.md.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sources/import/edz/README.md

@@ -44,6 +44,24 @@ used:
 The non-UI classes are deliberately decoupled from the widget so they can be
 tested headless.
 
+## Terms of Use / Legal notice
+
+The `.edz` files themselves are downloaded from the **EPLAN Data Portal**
+(data.eplan.com), which is operated by EPLAN Software & Service GmbH & Co. KG.
+The Data Portal Terms of Use (§ 5.4 at time of writing) restrict use of
+downloaded data to EPLAN products.
+
+**QElectroTech does not endorse or encourage violation of those terms.**
+Whether use of an `.edz` outside EPLAN products is permitted under your
+specific licence depends on the agreement you have with EPLAN and the
+individual manufacturer. You are solely responsible for ensuring that your use
+of `.edz` data complies with the applicable Terms of Use and any applicable
+law. If in doubt, contact EPLAN or the part manufacturer directly.
+
+QET's `.edz` reader parses only the portable, factual part data
+(pin designations, order numbers, manufacturer names). It does not reproduce
+any EPLAN-proprietary geometry or symbol data.
+
 ## Bundled LZMA SDK
 
 `lzma/` contains the decode-only subset of Igor Pavlov's **LZMA SDK** (public