Rename some plugin READMEs for consistency

plugins/magic-enter/README.md

@@ -0,0 +1,17 @@
+## Magic Enter plugin
+
+This plugin makes your enter key magical, by binding commonly used commands to it.
+
+To use it, add `magic-enter` to the plugins array in your zshrc file. You can set the
+commands to be run in your .zshrc, before the line containing plugins. If no command
+is specified in a git directory, `git status` is executed; in other directories, `ls`.
+
+```zsh
+# defaults
+MAGIC_ENTER_GIT_COMMAND='git status -u .'
+MAGIC_ENTER_OTHER_COMMAND='ls -lh .'
+
+plugins=(... magic-enter)
+```
+
+**Maintainer:** [@dufferzafar](https://github.com/dufferzafar)