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

tldr/krita

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# krita
+
+> A sketching and painting program designed for digital artists.
+> See also: `gimp`.
+> More information: <https://docs.krita.org/en/reference_manual/linux_command_line.html>.
+
+- Start Krita:
+
+`krita`
+
+- Open specific files:
+
+`krita {{path/to/image1 path/to/image2 ...}}`
+
+- Start without a splash screen:
+
+`krita --nosplash`
+
+- Start with a specific workspace:
+
+`krita --workspace {{Animation}}`
+
+- Start in fullscreen mode:
+
+`krita --fullscreen`