ci: Use --no-build-isolation to instal cgat

As [suggested](cgat-developers/cgat-apps#134 (comment)) attempting to install
dependencies (and in one instance `IsoSLAM` itself) with the `--no-build-isolation` flag in the hope that NumPy is
correctly detected by `cgat` when it is built and installed.

Further in light of [investigations](cgat-developers/cgat-apps#134 (comment))
also explicitly install the build requirements (`numpy` / `Cython` / `pysam` / `bdist_wheel``) prior to installing.

.github/workflows/sphinx_docs_to_gh_pages.yaml

@@ -24,7 +24,13 @@ jobs:
           python-version: 3.11
       - name: Installing the Documentation requirements
         run: |
-          pip3 install .[docs]
+          # Install build dependencies for now (see
+          # https://github.com/cgat-developers/cgat-apps/issues/134#issuecomment-2503431974)
+          pip install numpy
+          pip install Cython
+          pip install pysam
+          pip install bdist_wheel
+          pip3 install --no-build-isolation .[docs]
       - name: Running Sphinx to gh-pages Action
         # Uncomment if only tagged releases are to have documentation built
         # if: startsWith(github.ref, 'refs/tags')

.github/workflows/tests.yaml

@@ -40,10 +40,14 @@ jobs:
           pip install --upgrade virtualenv
           pip install --upgrade pip setuptools
           virtualenv --upgrade-embed-wheels
+          # Install build dependencies for now (see
+          # https://github.com/cgat-developers/cgat-apps/issues/134#issuecomment-2503431974)
           pip install numpy
-          pip show numpy
-          pip install cgatcore
-          pip install cgat
+          pip install Cython
+          pip install pysam
+          pip install bdist_wheel
+          pip install --no-build-isolation cgatcore
+          pip install --no-build-isolation cgat
           pip install -e .[tests]
       - name: Test with pytest
         run: |