Update Python version requirement to 3.12 in documentation and configuration files

- Updated `DEVELOP.md` to reflect CI testing on Python 3.12.
- Changed prerequisites in `INSTALL.md` to require Python 3.12 or higher.
- Modified `README.md` to specify Python 3.12 as the minimum requirement.
- Updated `pyproject.toml` and `uv.lock` to require Python 3.12.

.github/workflows/ci.yml

@@ -8,13 +8,9 @@ on:
 
 jobs:
   test:
-    name: Test (Python ${{ matrix.python-version }})
+    name: Test
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        python-version: ["3.11", "3.12"]
-
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -24,10 +20,10 @@ jobs:
         with:
           version: "latest"
 
-      - name: Set up Python ${{ matrix.python-version }}
+      - name: Set up Python 3.12
         uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: "3.12"
 
       - name: Install system dependencies
         run: sudo apt-get install -y libmediainfo-dev