v0.1.2: Preferences page, About page, full icon set, redesigned edit form

- Rework the add/edit form onto a generic, catalog-driven field model
  (JobFieldCatalog + JobEditModel), replacing the old hand-written
  ApplicationEditDialog with ApplicationEditPage
- Add a Preferences page (reachable from the hamburger menu) with a
  KColorSchemeManager-backed color scheme switcher
- Add an About page reading from KAboutData
- Ship a full hicolor icon set (16-128px + scalable) via ecm_install_icons
  instead of a single flat SVG
- Restyle the edit form after KDE System Settings' Audio page:
  Kirigami.ListSectionHeader per category, flat separated rows, no card
  borders
- Explicitly declare Kirigami/KirigamiAddons/ColorScheme as CMake
  dependencies instead of relying on the QML import scanner alone
- Add KDEClangFormat/KDEGitCommitHooks, a CMakePresets.json, and a
  REUSE + clang-format lint CI workflow
- Reformat SPDX headers to include copyright, remove debug screenshot
  scaffolding

.github/workflows/lint.yml

@@ -0,0 +1,38 @@
+# SPDX-FileCopyrightText: 2026 ToServeTheKing <[email protected]>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+name: Lint
+
+on:
+  pull_request: {}
+  push:
+    branches:
+      - main
+
+jobs:
+  reuse:
+    name: REUSE compliance
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: REUSE Compliance Check
+        uses: fsfe/reuse-action@v3
+
+  clang-format:
+    name: clang-format
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/flathub-infra/flatpak-github-actions:kde-6.10
+      options: --privileged
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Configure (generates the KDE .clang-format style)
+        run: cmake -B build -G Ninja -DBUILD_TESTING=OFF
+
+      - name: Check formatting
+        run: |
+          find src autotests -name '*.h' -o -name '*.cpp' | \
+            xargs clang-format --dry-run --Werror