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 />

webapp/src/main.js

@@ -11,6 +11,7 @@ require("vue-tour/dist/vue-tour.css");
 
 // Import MD icons
 import "material-symbols/outlined.css";
+import version from './version.js'
 
 // UIKit overrides
 UIkit.mixin(
@@ -35,6 +36,9 @@ Vue.config.productionTip = false;
 
 Vue.mixin({
   methods: {
+    app_version() {
+      return version;
+    },
     thingDescription(thing) {
       return this.$store.getters["wot/thingDescription"](thing);
     },