docs: add linkcheck ignore (also through lychee)

.gitignore

@@ -6,6 +6,7 @@ tmp/
 .DS_Store
 *notes-from-review.md
 *.idea*
+*venv*
 # Grammar / syntax checkers
 styles/
 # Exclude translation .mo files

.lycheeignore

@@ -0,0 +1,4 @@
+# List of links to ignore -- see https://lychee.cli.rs/recipes/excluding-links/
+#
+# All github.com links are excluded to avoid rate limiting
+https://github.com/

conf.py

@@ -205,6 +205,17 @@
 # myst complains about bibtex footnotes because of render order
 suppress_warnings = ["myst.footnote"]
 
+# -- Additional configuration for build process ------------------------------
+
+# Use the default linkcheck ignore list
+# https://www.sphinx-doc.org/en/master/usage/configuration.html#confval-linkcheck_ignore
+#
+# This is a list of regular expressions that match URIs to ignore when
+# doing linkcheck. Make sure to use raw strings (r"") for regexes. Also, any added
+# item should also be included in the .lycheeignore file.
+linkcheck_ignore = [
+    r"https://github.com/",
+]
 
 def _post_build(app: "Sphinx", exception: Exception | None) -> None:
     rss.generate_tutorials_feed(app)
@@ -215,3 +226,4 @@ def setup(app: "Sphinx"):
 
     # Parallel safety: https://www.sphinx-doc.org/en/master/extdev/index.html#extension-metadata
     return {"parallel_read_safe": True, "parallel_write_safe": True}
+