Exclude tools/screenshots/ from site render targets

Quarto auto-discovers all .qmd files in the project tree regardless of
navigation config. The 25 .qmd files in tools/screenshots/examples/
were being rendered as part of quarto.org.

Add project.render with explicit includes and !tools/screenshots/
exclusion. Rename 404.md and license.md to .qmd so the render list
only needs .qmd and .ipynb patterns. Update all references to
license.md across _quarto.yml, about.qmd, faq, preview workflow,
and reference docs.

Author: cderv

.github/workflows/preview.yml

@@ -148,7 +148,7 @@ jobs:
           base_sha: ${{ github.event.pull_request.base.sha || steps.pr-info.outputs.base_sha }}
           files: |
             # don't consider modifications on file used for includes for now.
-            license.md
+            license.qmd
             docs/**/[^_]*.qmd
             docs/**/[^_]*.md
             docs/extensions/listings/*.yml

404.md 404.qmd404.md renamed to 404.qmd

@@ -1,6 +1,10 @@
 project:
   type: website
   output-dir: _site
+  render:
+    - "**/*.qmd"
+    - "**/*.ipynb"
+    - "!tools/screenshots/"
   post-render:
     - tools/algolia-add-custom-attribute.ts
   resources:
@@ -47,7 +51,7 @@ website:
       - text: "FAQ"
         href: docs/faq/index.qmd
       - text: "License"
-        href: license.md
+        href: license.qmd
       - text: "Trademark"
         href: trademark.qmd
     right:

_quarto.yml

@@ -13,7 +13,7 @@ The overarching goal of Quarto is to make the process of creating and collaborat
 
 -   Make reproducible research and publications the norm rather than the exception. Reproducibility requires that the code and data required to create a manuscript are an integrated part of it. However, this isn't often straightforward in practice---Quarto aims to make it easier to adopt a reproducible workflow than not.
 
-Quarto is [open source software](/license.md). We believe that it's better for everyone if the tools used for research and science are free and open. Reproducibility, widespread sharing of knowledge and techniques, and the leveling of the playing field by eliminating cost barriers are but a few of the shared benefits of free software in science.
+Quarto is [open source software](/license.qmd). We believe that it's better for everyone if the tools used for research and science are free and open. Reproducibility, widespread sharing of knowledge and techniques, and the leveling of the playing field by eliminating cost barriers are but a few of the shared benefits of free software in science.
 
 ## Project
 

about.qmd

@@ -74,7 +74,7 @@ Quarto's dependencies include:
 
 ### Is Quarto free to use?
 
-Yes! Quarto is [open source](/license.md). Quarto version 1.3 (and earlier) is licensed under the [GNU GPL v2](https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html). Quarto version 1.4 is licensed under the [MIT License](https://opensource.org/license/mit/).
+Yes! Quarto is [open source](/license.qmd). Quarto version 1.3 (and earlier) is licensed under the [GNU GPL v2](https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html). Quarto version 1.4 is licensed under the [MIT License](https://opensource.org/license/mit/).
 
 ### Can I use Quarto to develop proprietary content?
 

docs/faq/index.qmd

@@ -88,7 +88,7 @@ An announcement that appears at the top of the site. For example:
       - text: "About"
         href: about.qmd
       - text: "License"
-        href: license.md
+        href: license.qmd
       - text: "Trademark"
         href: trademark.qmd
 ```