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

tldr/unar

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# unar
+
+> Extract contents from archive files.
+> More information: <https://manned.org/unar>.
+
+- Extract an archive to the current directory:
+
+`unar {{archive}}`
+
+- Extract an archive to the specified directory:
+
+`unar -o {{path/to/directory}} {{archive}}`
+
+- Force overwrite if files to be unpacked already exist:
+
+`unar -f {{archive}}`
+
+- Force rename if files to be unpacked already exist:
+
+`unar -r {{archive}}`
+
+- Force skip if files to be unpacked already exist:
+
+`unar -s {{archive}}`