Added file version.py and fixed reference

.github/workflows/checks.yml

@@ -17,8 +17,12 @@ jobs:
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/[email protected]
 
+      # file .github/workflows/checks.yml
+      # step "Check Version(s)" searches file exasol/toolbox/version.py
+      # while actually the github repo using the PTB should use a local path
+      # to its own version file
       - name: Check Version(s)
-        run: poetry run version-check exasol/toolbox/version.py
+        run: poetry run version-check version.py
 
   build-documentation-job:
     name: Build Documentation
@@ -28,10 +32,10 @@ jobs:
     steps:
       - name: SCM Checkout
         uses: actions/checkout@v3
-      
+
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/[email protected]
-      
+
       - name: Build Documentation
         run: |
           poetry run python -m nox -s build-docs

version.py

@@ -0,0 +1,7 @@
+# ATTENTION:
+# This file is generated, do not edit it manually!
+# If you need to change the version, do so in the project.toml, e.g. by using `poetry version X.Y.Z`.
+MAJOR = 0
+MINOR = 0
+PATCH = 1
+VERSION = f"{MAJOR}.{MINOR}.{PATCH}"