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

tldr/linux/gzexe

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gzexe
+
+> Compress executable files while keeping them executable.
+> Back up the original file, appending `~` to its name and create a shell script that uncompresses and executes the binary inside it.
+> More information: <https://manned.org/gzexe.1>.
+
+- Compress an executable file in-place:
+
+`gzexe {{path/to/executable}}`
+
+- Decompress a compressed executable in-place (i.e. convert the shell script back to an uncompressed binary):
+
+`gzexe -d {{path/to/compressed_executable}}`