Release prep v0.1.0: LGPL-3.0-or-later + real Gitea host URL

Closes the two release-prep items called out in the Phase 5 closure
paragraph (a3d35a7).

License: LGPL-3.0-or-later. Chosen to align with Qt 6's LGPLv3, which
keeps the AppImage's relinkability obligation (PLAN.md §12) satisfied
and avoids version-mixing friction with upstream Qt. Two files at the
repo root:

  - LICENSE      — LGPL-3.0 text (the project license).
  - LICENSE.GPL  — GPL-3.0 text the LGPL-3.0 explicitly incorporates
                   ("This version of the GNU Lesser General Public
                   License incorporates the terms and conditions of
                   version 3 of the GNU General Public License…").

framework/php/composer.json: "license": "proprietary" → SPDX
"LGPL-3.0-or-later". CHANGELOG Notes section updated with the actual
license + LICENSE/LICENSE.GPL pointer.

Repo URL: every `gitea.example/<org|you>/php-qml` (and `<org>/<repo>`
in docs/packaging-linux.md) replaced with the real
`src.bundespruefstelle.ch/magdev/php-qml`. Touched README.md,
CHANGELOG.md (compare + tag links), docs/getting-started.md,
docs/packaging-linux.md (build-appimage --update-info example +
latest.json appcast example).

PLAN.md: status line bumped to "v0.1.0 ready to tag — LGPL-3.0-or-later
license shipped, repo URL fixed". Phase 5 closure paragraph rewritten
to record both items resolved (rather than pending).

Only remaining manual edit at tag time: CHANGELOG `[0.1.0] — TBD` →
`[0.1.0] — YYYY-MM-DD` (per Keep-a-Changelog), and the actual
`git tag v0.1.0 && git push --tags` itself, which triggers
.gitea/workflows/release.yml. Per the branching memory, releases land
on main — merge dev → main first.

Verified: `make quality` from framework/skeleton green (16 tests, 45
assertions; PHPStan + cs-fixer clean; maker snapshots match).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README.md

@@ -19,7 +19,7 @@ It is **not** a PHP↔Qt language binding — the languages run in separate proc
 ## 60-second tour
 
 ```bash
-git clone https://gitea.example/<you>/php-qml && cd php-qml
+git clone https://src.bundespruefstelle.ch/magdev/php-qml && cd php-qml
 
 # Scaffold a fresh app
 ./bin/php-qml-init my-app