do not run workflow on README changers and better examples thumbnails

Author: maureeungaro

.github/workflows/codeql.yml

@@ -3,8 +3,12 @@ name: "CodeQL Advanced"
 on:
   push:
     branches: [ "main" ]
+    paths-ignore:
+      - "**/README*"
   pull_request:
     branches: [ "main" ]
+    paths-ignore:
+      - "**/README*"
   schedule:
     - cron: '20 2 * * 5'
 

.github/workflows/dockers_deploy_and_test.yml

@@ -20,12 +20,15 @@ on:
   workflow_dispatch:
 
   pull_request:
+    paths-ignore:
+      - "**/README*"
   merge_group:
   push:
     branches: [ main ]
     tags: [ '*' ]
     paths-ignore:
       - "**/*.md"
+      - "**/README*"
       - "releases/**"
       - "doc/**"
 

.github/workflows/doxygen.yml

@@ -7,6 +7,8 @@ on:
   push:
     branches:
       - '*'
+    paths-ignore:
+      - "**/README*"
   workflow_dispatch:
 
 jobs:

.github/workflows/sanitize.yml

@@ -10,7 +10,11 @@ on:
   push:
     branches: [ main ]
     tags: [ 'v*' ]
+    paths-ignore:
+      - "**/README*"
   pull_request:
+    paths-ignore:
+      - "**/README*"
 
 jobs:
   discover:

README.md

@@ -144,11 +144,12 @@ Geometry scripts can write SQLite or ASCII databases, display geometry with PyVi
 
 PyVista is part of the normal GEMC geometry workflow. It lets users inspect detector geometry before running Geant4, export portable VTK.js scenes for documentation, and catch placement or rotation mistakes while editing Python geometry scripts.
 
+<!-- PyVista gallery setting: edit width="200" height="200" below to resize all thumbnails. -->
 | B1 | B2 |
 | --- | --- |
-| <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/b1/b1.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/b1/geometry.png" alt="B1 PyVista geometry" width="200" height="200"></a> | <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/b2/b2.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/b2/geometry.png" alt="B2 PyVista geometry" width="200" height="200"></a> |
+| <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/b1/b1.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/b1/geometry.png" alt="B1 PyVista geometry" width="300" height="300"></a> | <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/b2/b2.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/b2/geometry.png" alt="B2 PyVista geometry" width="300" height="300"></a> |
 | Materials | Simple Flux |
-| <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/materials/material.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/materials/geometry.png" alt="Materials PyVista geometry" width="200" height="200"></a> | <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/simple_flux/simple_flux.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/simple_flux/geometry.png" alt="Simple Flux PyVista geometry" width="200" height="200"></a> |
+| <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/materials/material.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/materials/geometry.png" alt="Materials PyVista geometry" width="300" height="300"></a> | <a href="https://gemc.github.io/home/assets/vtkjs-viewer.html?fileURL=https://gemc.github.io/home/assets/images/examples/simple_flux/simple_flux.vtksz"><img src="https://gemc.github.io/home/assets/images/examples/simple_flux/geometry.png" alt="Simple Flux PyVista geometry" width="300" height="300"></a> |
 
 Open the linked interactive PyVista scenes generated from the GEMC examples.