Updated CI and package import system

Refactored the CI workflows to include package installation and import
testing. Ensured package is importable after installation by creating a
new '__main__.py' module to check imports. This adds an extra validation
step to the CI process, catching potential import issues early. Import
statements in '__init__.py' have also been updated to use 'as' for
clarity and namespace control.

.github/workflows/python-package-ubuntu.yml

@@ -33,6 +33,10 @@ jobs:
       run: |
         sudo apt-get install -y libhdf5-dev limesuite liblimesuite-dev automake gcc pkg-config build-essential python-is-python3
 
-    - name: Build the package
+    - name: Install the package
       run: |
-        python -m build
+        pip install .
+
+    - name: Test if the package can be imported
+      run: |
+        python -m limedriver

.github/workflows/python-package.yml

@@ -24,6 +24,14 @@ jobs:
       run: |
         yes | pacman -S python python-pip hdf5 limesuite python-build automake gcc pkgconf base-devel
 
+    - name: Install the package
+      run: |
+        pip install .
+
+    - name: Test if the package can be imported
+      run: |
+        python -m limedriver
+
     - name: Build the package
       run: |
         python -m build
@@ -32,4 +40,4 @@ jobs:
       uses: actions/upload-artifact@v2
       with:
         name: built-package
-        path: dist/
+        path: dist/

src/limedriver/__init__.py

@@ -1,2 +1,2 @@
-import limedriver.binding
-import limedriver.hdf_reader
+import limedriver.binding as binding
+import limedriver.hdf_reader as hdf_reader

src/limedriver/__main__.py

@@ -0,0 +1 @@
+from limedriver import binding, hdf_reader