Update cheatsheets

tldr/linux/lid.idutils

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lid
+
+> Query an ID database for tokens matching a pattern.
+> Note: An ID database must first be built using `mkid`.
+> More information: <https://www.gnu.org/software/idutils/manual/html_node/lid-invocation.html>.
+
+- List all tokens and their file locations in the ID database:
+
+`lid`
+
+- Find files containing a specific token:
+
+`lid {{token}}`
+
+- Find tokens matching a pattern, ignoring case:
+
+`lid {{[-i|--ignore-case]}} {{token}}`
+
+- Find tokens matching an extended regular expression:
+
+`lid {{[-r|--regexp]}} "{{pattern}}"`
+
+- Output matching lines in grep-style format:
+
+`lid {{[-R|--result]}} grep {{token}}`
+
+- Find tokens that appear only once (useful for finding unused definitions):
+
+`lid {{[-F|--frequency]}} 1`