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

tldr/octave

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# octave
+
+> A programming language for scientific computing.
+> More information: <https://docs.octave.org/latest/Invoking-Octave-from-the-Command-Line.html>.
+
+- Start an interactive session:
+
+`octave`
+
+- Execute a specific script file:
+
+`octave {{path/to/script.m}}`
+
+- Execute a script file with specific arguments:
+
+`octave {{path/to/script.m}} {{argument1 argument2 ...}}`
+
+- Start an interactive session with a GUI:
+
+`octave --gui`
+
+- Display help:
+
+`octave --help`
+
+- Display version:
+
+`octave --version`