fix(deps): replace optional dependencies with dependency groups

Definition: https://packaging.python.org/en/latest/specifications/dependency-groups

The optional dependency table ([project.optional-dependencies]) is
supposed to be user-facing for installs of TagStudio. Meanwhile, the
replacement dependency groups is explicitly meant for extra development
tools, so lets use that.

This does mean the command for a full development environment has changed
from:
```sh
pip install -e '.[dev]'
```

To:
```sh
pip install -e . --group all
```

The documentation has been adjusted for a quick replacement, but
probably should have more information on a later time.

.github/workflows/publish_docs.yaml

@@ -36,7 +36,7 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade uv
-          uv pip install --system .[mkdocs]
+          uv pip install --system . --group mkdocs
 
       - run: echo "cache_id=$(date --utc '+%V')" >> $GITHUB_ENV
 

.github/workflows/pyright.yaml

@@ -22,7 +22,7 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade uv
-          uv pip install --system .[pyright,pytest]
+          uv pip install --system . --group pyright --group pytest
 
       - name: Execute Pyright
         uses: jordemort/action-pyright@v1

.github/workflows/pytest.yaml

@@ -26,7 +26,7 @@ jobs:
         name: Install Python dependencies
         run: |
           python -m pip install --upgrade uv
-          uv pip install --system .[pytest]
+          uv pip install --system . --group pytest
 
       - name: Install system dependencies
         run: |

.github/workflows/release.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade uv
-          uv pip install --system .[pyinstaller]
+          uv pip install --system . --group pyinstaller
 
       - name: Execute PyInstaller
         run: |
@@ -76,7 +76,7 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade uv
-          uv pip install --system .[pyinstaller]
+          uv pip install --system . --group pyinstaller
 
       - name: Execute PyInstaller
         run: |
@@ -117,7 +117,7 @@ jobs:
       - name: Install Python dependencies
         run: |
           python -m pip install --upgrade uv
-          uv pip install --system .[pyinstaller]
+          uv pip install --system . --group pyinstaller
 
       - name: Execute PyInstaller
         run: |