Move pages under tldr, lint run.sh, update docs

tldr/sd

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sd
+
+> Intuitive find and replace.
+> More information: <https://github.com/chmln/sd>.
+
+- Trim some whitespace using a regular expression (output stream: `stdout`):
+
+`{{echo 'lorem ipsum 23   '}} | sd '\s+$' ''`
+
+- Replace words using capture groups (output stream: `stdout`):
+
+`{{echo 'cargo +nightly watch'}} | sd '(\w+)\s+\+(\w+)\s+(\w+)' 'cmd: $1, channel: $2, subcmd: $3'`
+
+- Find and replace in a specific file (output stream: `stdout`):
+
+`sd -p {{'window.fetch'}} {{'fetch'}} {{path/to/file.js}}`
+
+- Find and replace in all files in the current project (output stream: `stdout`):
+
+`sd {{'from "react"'}} {{'from "preact"'}} "$(find . -type f)"`