docs: add example of qref visualization in tutorials

Added qref visualization examples in the tutorials to demonstrate how to visualize programs. 
Updated the quality_checks.yaml file to include Graphviz as a dependency.

.github/workflows/quality_checks.yaml

@@ -82,6 +82,8 @@ jobs:
       - uses: actions/checkout@v2
       - name: Setup poetry
         uses: abatilo/actions-poetry@v2
+      - name: Setup Graphviz
+        uses: ts-graphviz/setup-graphviz@v2
       - name: Install package and deps
         run: |
           poetry install -E jupyter

.pre-commit-config.yaml

@@ -22,7 +22,7 @@ repos:
     rev: 5.13.2
     hooks:
       - id: isort
-        args: ["--profile", "black", "--filter-files", "--check"]
+        args: ['--profile', "black", "--filter-files", "--check"]
 
   - repo: https://github.com/ambv/black
     rev: 24.4.1
@@ -40,4 +40,5 @@ repos:
     hooks:
       - id: conventional-pre-commit
         stages: [commit-msg]
-        args: []
+        args: []
+