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

tldr/keytool

@@ -0,0 +1,21 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# keytool
+
+> A certificate management utility included with Java.
+> More information: <https://docs.oracle.com/en/java/javase/20/docs/specs/man/keytool.html>.
+
+- Create a keystore:
+
+`keytool -genkeypair -v -keystore {{path/to/file.keystore}} -alias {{key_name}}`
+
+- Change a keystore password:
+
+`keytool -storepasswd -keystore {{path/to/file.keystore}}`
+
+- Change a key's password inside a specific keystore:
+
+`keytool -keypasswd -alias {{key_name}} -keystore {{path/to/file.keystore}}`