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

tldr/convmv

@@ -0,0 +1,17 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# convmv
+
+> Convert filenames (NOT file content) from one encoding to another.
+> More information: <https://www.j3e.de/linux/convmv/man/>.
+
+- Test filename encoding conversion (don't actually change the filename):
+
+`convmv -f {{from_encoding}} -t {{to_encoding}} {{input_file}}`
+
+- Convert filename encoding and rename the file to the new encoding:
+
+`convmv -f {{from_encoding}} -t {{to_encoding}} --notest {{input_file}}`