feat(easel): add version to header

gallery/easel/route/view/common/templates/base.html

@@ -30,6 +30,9 @@
         {% block header %}{% endblock %}
       </div>
       <ul class="navbar-nav flex-row flex-wrap ms-md-auto">
+        <li class="nav-item me-2">
+          <span class="nav-link">{{ version }}</span>
+        </li>
         <li class="nav-item dropdown">
           <button class="btn btn-link nav-link py-2 px-0 px-lg-2 dropdown-toggle d-flex align-items-center"
                   id="bd-language"

gallery/version.py

@@ -1,5 +1,3 @@
-__version__ = "0.2.2"
-
 import tomllib
 from pathlib import Path