Update favicon path and add frontend image asset for documentation

Author: josemarinfarina

docs/_quarto.yml

@@ -10,7 +10,7 @@ website:
   repo-actions: [edit, issue]
   page-navigation: true
   search: true
-  favicon: ../images/frontend.png
+  favicon: images/frontend.png
   navbar:
     background: primary
     left:

docs/documentation/workflow.qmd

@@ -6,7 +6,7 @@ sidebar: documentation
 BasicSpanner exposes the full analysis pipeline through a single graphical
 interface organized in two sidebars and a central viewer.
 
-![](../../images/frontend.png){fig-align="center" width="100%"}
+![](../images/frontend.png){fig-align="center" width="100%"}
 
 ## Left sidebar
 

docs/images/frontend.png

@@ -12,7 +12,7 @@ Given a set of seeds, BasicSpanner computes the *basic network*: the
 minimal subgraph that preserves every pairwise distance among the seeds.
 :::
 
-![](../images/frontend.png){fig-align="center" width="90%"}
+![](images/frontend.png){fig-align="center" width="90%"}
 
 ## What is a basic network?