Use same version number for server and webapp, add CI check

- Check webapp and server have same version number
- Use `genversion` on build to create javascript file with version string
from pyproject.toml
- Expose the version number in the js interface
- Correct format of current of alpha version string because javascript complains

Closes #382

webapp/src/components/tabContentComponents/aboutComponents/statusPane.vue

@@ -25,7 +25,7 @@
 
       <div>
         <b>Server Version:</b> <br />
-        V3 (pre-alpha)
+        v{{ app_version() }}
       </div>
 
       <hr />