Orca-Cad: port SnapOrca Design (parametric CAD tab) onto mainline OrcaSlicer

Grafts the sketch-first CAD environment from snaporca-cad onto the mainline
OrcaSlicer/OrcaSlicer base (vs snaporca's Snapmaker/OrcaSlicer base):
- 133 new files: CadDocument/SketchEngine/GeometryEngine/SketchConstraints/
  SketchSolver/SketchInference/ThreadStandards + vendored libslvs solver;
  DesignPanel/DesignCanvas/DesignSketchTool/SketchInlineEditor GUI; GLGizmo
  Primitive/Sketch; 75 design icons; Catch2 tests.
- Integration hooks ported to mainline's diverged versions: Design tab in
  MainFrame, embedded design viewport + sketch overlay + per-canvas chrome
  suppression in GLCanvas3D/PartPlate, gizmo registration, Plater accessors,
  CMake wiring (libslvs subdir, CAD sources, OCCT ModelingAlgorithms=ON).

Structural integration complete; build verification pending.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q

scripts/Dockerfile.deps

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+# Deps-only base image for fast iteration on SnapOrca.
+# Identical system+pinned-dependency setup to scripts/Dockerfile, but STOPS after
+# `build_linux.sh -dr` (no slicer/AppImage build). Produces an image with the pinned
+# deps baked at /OrcaSlicer/deps/build/destdir, so the slicer can be rebuilt
+# incrementally via scripts/docker-iter-build.sh without re-running the long deps build.
+#
+# Build once (rebuild only when deps/ changes, e.g. OCCT module flags):
+#   docker build -t snaporca-deps -f scripts/Dockerfile.deps .
+FROM docker.io/ubuntu:24.04
+LABEL maintainer="SnapOrca CAD iteration base"
+
+# Disable interactive package configuration
+RUN apt-get update && \
+    echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
+
+# Add a deb-src
+RUN echo deb-src http://archive.ubuntu.com/ubuntu \
+    $(cat /etc/*release | grep VERSION_CODENAME | cut -d= -f2) main universe>> /etc/apt/sources.list
+
+RUN apt-get update && apt-get install  -y \
+    autoconf \
+    build-essential \
+    cmake \
+    curl \
+    eglexternalplatform-dev \
+    extra-cmake-modules \
+    file \
+    git \
+    gstreamer1.0-plugins-bad \
+    gstreamer1.0-libav \
+    libcairo2-dev \
+    libcurl4-openssl-dev \
+    libdbus-1-dev \
+    libglew-dev \
+    libglu1-mesa-dev \
+    libgstreamer1.0-dev \
+    libgstreamerd-3-dev \
+    libgstreamer-plugins-base1.0-dev \
+    libgstreamer-plugins-good1.0-dev \
+    libgtk-3-dev \
+    libsecret-1-dev \
+    libsoup2.4-dev \
+    libssl3 \
+    libssl-dev \
+    libtool \
+    libudev-dev \
+    libwayland-dev \
+    libwebkit2gtk-4.1-dev \
+    libxkbcommon-dev \
+    locales \
+    locales-all \
+    m4 \
+    pkgconf \
+    sudo \
+    wayland-protocols \
+    wget
+
+ENV LC_ALL=en_US.utf8
+RUN locale-gen $LC_ALL
+ENV SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt
+
+COPY ./ OrcaSlicer
+WORKDIR OrcaSlicer
+
+# System dependencies
+RUN ./build_linux.sh -u
+
+# Pinned dependencies in ./deps (OCCT 7.6 with ModelingAlgorithms enabled, OpenCV,
+# OpenVDB, Boost, wxWidgets, ...). This is the long step; it is baked into the image.
+RUN ./build_linux.sh -dr

scripts/docker-iter-build.sh

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+#!/usr/bin/env bash
+# Incremental slicer build against the snaporca-deps base image.
+#
+# The deps-baked image (built from scripts/Dockerfile.deps) carries the pinned
+# dependencies at /OrcaSlicer/deps/build/destdir. This script mounts the LIVE source
+# tree and resources over the baked copy so code/CMake edits apply immediately, and
+# persists /OrcaSlicer/build in a named volume so ninja recompiles only what changed.
+#
+# Result: edit -> rebuild in seconds-to-minutes instead of a full Docker rebuild.
+#
+# Usage (run on the build host, e.g. behemoth, from anywhere):
+#   scripts/docker-iter-build.sh
+#   IMAGE=snaporca-deps scripts/docker-iter-build.sh
+#
+# On success the binary is inside the persistent volume at
+# /OrcaSlicer/build/package/bin/snapmaker-orca (copy it out with a follow-up
+# `docker run --rm -v snaporca_buildcache:/b alpine cp ...` or via this script's tail).
+set -euo pipefail
+
+REPO="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+IMAGE="${IMAGE:-snaporca-deps}"
+BUILD_VOL="${BUILD_VOL:-snaporca_buildcache}"
+
+echo "REPO=$REPO  IMAGE=$IMAGE  BUILD_VOL=$BUILD_VOL"
+
+docker run --rm \
+  -v "$REPO/src":/OrcaSlicer/src \
+  -v "$REPO/resources":/OrcaSlicer/resources \
+  -v "$BUILD_VOL":/OrcaSlicer/build \
+  "$IMAGE" \
+  bash -lc 'cd /OrcaSlicer && ./build_linux.sh -sr'
+
+echo "=== build finished; checking for binary ==="
+docker run --rm -v "$BUILD_VOL":/b "$IMAGE" \
+  bash -lc 'ls -lh /b/package/bin/snapmaker-orca 2>/dev/null && file /b/package/bin/snapmaker-orca || echo "NO BINARY"'