fix: rename all novelwriter icons/assets to umbraedit

- Rename novelwriter.iconset to umbraedit.iconset with all icon sizes
- Rename setup/icons/novelwriter.* to umbraedit.*
- Rename setup/data/hicolor/ novelwriter icons to umbraedit
- Rename setup/data/novelwriter.* to umbraedit.*
- Rename docs/source/_static/novelwriter-* to umbraedit-*
- Rename setup/flatpak/io.novelwriter.novelwriter.yml to io.umbraedit.umbraedit.yml
- Rename setup/data/novelwriter.desktop to umbraedit.desktop
- Update setup/macos/build.sh to reference umbraedit.iconset
- Rebuild macOS DMG with correct UmbraEdit icon

setup/flatpak/io.umbraedit.umbraedit.yml

@@ -0,0 +1,81 @@
+app-id: io.umbraedit.umbraedit
+runtime: org.kde.Platform
+runtime-version: "@QT_VERSION@"
+sdk: org.kde.Sdk
+base: com.riverbankcomputing.PyQt.BaseApp
+base-version: "@QT_VERSION@"
+cleanup-commands:
+  - /app/cleanup-BaseApp.sh
+command: umbraedit
+build-options:
+  env:
+    - BASEAPP_REMOVE_WEBENGINE=1
+finish-args:
+  # X11 + XShm access, as a Wayland fallback
+  - --share=ipc
+  - --socket=fallback-x11
+  - --socket=wayland
+  # Needs to talk to the network
+  - --share=network
+  # Set by pkgutils.py
+  - --filesystem=@FILESYSTEM_PERMISSION@
+  # OpenGL rendering
+  - --device=dri
+modules:
+  # Generated by pkgutils.py
+  - pypi-deps.json
+  - enchant.json
+
+  - name: UmbraEdit
+    buildsystem: simple
+    build-commands:
+      # Set by pkgutils.py, must run before the wheel is built
+      - install -Dm644 -T meta.toml umbraedit/assets/meta.toml
+
+      - python3 -m build --wheel --no-isolation
+      - python3 -m installer --prefix=${FLATPAK_DEST} dist/*.whl
+
+      # XDG Files
+      - install -Dm644 setup/data/umbraedit.desktop -T ${FLATPAK_DEST}/share/applications/${FLATPAK_ID}.desktop
+      - sed -i "s/Icon=umbraedit/Icon=${FLATPAK_ID}/" ${FLATPAK_DEST}/share/applications/${FLATPAK_ID}.desktop
+      - for size in 16x16 24x24 32x32 48x48 64x64 128x128 256x256 512x512; do
+        install -Dm644 -T setup/data/hicolor/$size/apps/umbraedit.png ${FLATPAK_DEST}/share/icons/hicolor/$size/apps/${FLATPAK_ID}.png;
+        install -Dm644 -T setup/data/hicolor/$size/mimetypes/application-x-umbraedit-project.png ${FLATPAK_DEST}/share/icons/hicolor/$size/mimetypes/application-x-umbraedit-project.png;
+        done
+      - install -Dm644 -T setup/data/hicolor/scalable/apps/umbraedit.svg ${FLATPAK_DEST}/share/icons/hicolor/scalable/apps/${FLATPAK_ID}.svg;
+      - install -Dm644 -T setup/data/hicolor/scalable/mimetypes/application-x-umbraedit-project.svg ${FLATPAK_DEST}/share/icons/hicolor/scalable/mimetypes/application-x-umbraedit-project.svg;
+      - install -Dm644 -T umbraedit.appdata.xml ${FLATPAK_DEST}/share/metainfo/${FLATPAK_ID}.metainfo.xml
+      - sed -i "s/umbraedit.desktop/${FLATPAK_ID}.desktop/" ${FLATPAK_DEST}/share/metainfo/${FLATPAK_ID}.metainfo.xml
+
+      # License Files
+      - install -Dm644 -T LICENSE.md ${FLATPAK_DEST}/share/licenses/${FLATPAK_ID}/LICENSE.md
+      - install -Dm644 -T setup/LICENSE-Apache-2.0.txt ${FLATPAK_DEST}/share/licenses/${FLATPAK_ID}/LICENSE-Apache-2.0.txt
+    sources:
+      - type: file
+        path: ../pyproject.toml
+
+      - type: file
+        path: ../LICENSE.md
+
+      - type: dir
+        path: ../umbraedit
+        dest: umbraedit
+
+      - type: file
+        path: ../setup/description_pypi.md
+        dest: setup
+
+      - type: file
+        path: ../setup/LICENSE-Apache-2.0.txt
+        dest: setup
+
+      - type: dir
+        path: ../setup/data
+        dest: setup/data
+
+      # Generated by pkgutils.py
+      - type: file
+        path: umbraedit.appdata.xml
+
+      - type: file
+        path: meta.toml