remove STLs and add workflow to generate them

.github/workflows/scad.yml

+name: STLs
+
+# build for each push and pull request
+on: [push, pull_request]
+
+jobs:
+  render:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Checkout repo submodules
+        run: git submodule update --init
+
+      - name: Install dependencies
+        run: sudo apt-get install -y openscad zip
+
+      - name: Render STLs
+        run: |
+          ./3dprint/generate_stls.sh
+
+      - name: Upload part files
+        uses: actions/upload-artifact@v4.0.0
+        with:
+          name: drumkit-stl
+          path: 3dprint/stl
+          if-no-files-found: error
+
+      - name: Archive release files
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          cd 3dprint
+          zip -r drumkit-stl stl
+
+      - name: Upload release files
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: softprops/action-gh-release@v1
+        with:
+          files: 3dprint/drumkit-stl.zip

.gitignore

 docs/book
 docs/src/plot
 docs/src/inc_*.md
+
+3dprint/stl

3dprint/generate_stls.sh

+#!/bin/bash
+
+# ----------------------------------------------------------------------------
+# Copyright (c) 2023 Kauzerei (openautolab@kauzerei.de)
+# Copyright (c) 2023 Thomas Buck (thomas@xythobuz.de)
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# See <http://www.gnu.org/licenses/>.
+# ----------------------------------------------------------------------------
+
+# space separated list of scad files (without extension)
+MODULES="actuator beam enclosure tamb_mount"
+OUTDIR="stl"
+
+# enter directory of script (case)
+cd "$(dirname "$0")"
+
+# Detect OS
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    echo "Mac OS X detected"
+    SCAD="open -n -a OpenSCAD --args"
+else
+    echo "Linux detected"
+    SCAD="openscad"
+fi
+
+echo "deleting previous build output"
+rm -rf $OUTDIR
+mkdir -p $OUTDIR
+
+for MODULE in $MODULES
+do
+    PARTS=$(grep -o "part.*//.*\[.*]" ${MODULE}.scad | sed 's/,/ /g' | sed 's/.*\[\([^]]*\)\].*/\1/g')
+    echo "generating from ${MODULE}"
+
+    for PART in ${PARTS}
+    do
+        if [[ "${PART}" != "OPT_"* ]]; then
+            echo ${PART}
+            FILENAME=$(echo $OUTDIR/${MODULE}_${PART}.stl | tr '[:upper:]' '[:lower:]')
+            $SCAD $(pwd)/${MODULE}.scad --D part=\"${PART}\" --o $(pwd)/${FILENAME}
+        fi
+    done
+done

README.md

 
 ![PCB](https://github.com/xythobuz/lars/actions/workflows/kicad.yml/badge.svg)
 ![Docs](https://github.com/xythobuz/lars/actions/workflows/docs.yml/badge.svg)
+![STLs](https://github.com/xythobuz/lars/actions/workflows/scad.yml/badge.svg)
 
 This is a simple drum machine / loopstation.
 It's made for three hand-wound solenoids mounted to a tambourine.

docs/src/3dprint.md

+# Mounting Hardware
+
+**TODO** work in progress
+
+

docs/src/SUMMARY.md

 
 # Hardware
 
+- [Mounting Hardware](./3dprint.md)
 - [Prototype](./pcb1.md)
   - [Schematics](./pcb1_sch.md)
   - [PCB Layout](./pcb1_pcb.md)