Dev toolchain scan: DEVELOPMENT.md, dev-setup.sh, OpenSCAD + Android Studio flatpaks

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/dev-setup.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+# One-shot developer toolchain setup for the main-desktop image.
+# Run as your user after first boot (safe to re-run). See DEVELOPMENT.md for the why.
+set -euo pipefail
+
+echo "== Homebrew tools =="
+brew install mise gh cosign
+
+echo "== Toolchains (mise) =="
+mise use -g node@22 python@3.12 go@latest rust@latest java@temurin-21 dotnet@10
+mise install node@18 node@20 python@3.11 java@temurin-17 java@temurin-25
+
+echo "== RTL-SDR udev rules (FRScanner) =="
+if [ ! -f /etc/udev/rules.d/20-rtlsdr.rules ]; then
+  sudo tee /etc/udev/rules.d/20-rtlsdr.rules >/dev/null <<'EOF'
+# Generic RTL2832U (rtl-sdr) dongles — allow non-root access
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2838", MODE="0666", TAG+="uaccess"
+SUBSYSTEM=="usb", ATTRS{idVendor}=="0bda", ATTRS{idProduct}=="2832", MODE="0666", TAG+="uaccess"
+EOF
+  sudo udevadm control --reload-rules
+fi
+
+echo "== Native-build distrobox =="
+if ! distrobox list 2>/dev/null | grep -q '^.*| *dev '; then
+  distrobox create --yes dev --image registry.fedoraproject.org/fedora:44
+  distrobox enter dev -- sudo dnf install -y gcc gcc-c++ make cmake pkgconf python3-devel \
+    gtk4-devel zbar libsndfile mediainfo-libs rtl-sdr rtl-sdr-devel mkvtoolnix \
+    python3-tkinter python3-dbus flashrom
+fi
+
+echo "== Done =="
+echo "Remaining manual bits (see DEVELOPMENT.md):"
+echo "  - copy ~/godot/ (pinned 4.2/4.3 binaries) and ~/.local/share/godot/ from old machine"
+echo "  - bring per-project .env files (API keys)"
+echo "  - ujust dx-group  (docker group), then re-login"