Update cheatsheets

tldr/lychee

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# 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`