fasd: add README (#8334)

plugins/fasd/README.md

+# fasd
+
+[`Fasd`](https://github.com/clvv/fasd) (pronounced similar to "fast") is a command-line productivity booster. Fasd offers quick access to files and directories for POSIX shells.
+
+To use it, add `fasd` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... fd)
+```
+
+## Installation
+
+Please find detailed installation guide [`here`](https://github.com/clvv/fasd#install)
+
+## Aliases
+
+| Alias | Command                                   | Description                                                 |
+|-------|-------------------------------------------|-------------------------------------------------------------|
+| v     | `fasd -f -e "$EDITOR"`                    | List frequent/recent files matching the given filename.     |
+| o     | `fasd -a -e xdg-open`                     | List frequent/recent files and directories matching.        |
+| j     | `fasd_cd -d -i`                           | cd with interactive selection                               |
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