lychee: add page (#13733)

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/lychee.md

@@ -0,0 +1,24 @@
+# lychee
+
+> Find broken URLs.
+> More information: <https://lychee.cli.rs/usage/cli/>.
+
+- Scan a website for broken links:
+
+`lychee {{https://example.com}}`
+
+- Display a breakdown of error types:
+
+`lychee --format detailed {{https://example.com}}`
+
+- Limit the amount of connections to prevent DDOS protection:
+
+`lychee --max-concurrency {{5}} {{links.txt}}`
+
+- Check files in a directory structure for any broken URLs:
+
+`grep -r "{{pattern}}" | lychee -`
+
+- Display help:
+
+`lychee --help`