update cli doc

docs/cli/README.md

@@ -1,3 +1,38 @@
 # Using as a CLI
 
 🚧 WIP 🚧
+
+- [Installation](#installation)
+- [Usage](#usage)
+
+## Installation
+
+### Homebrew
+
+```console
+$ brew install koki-develop/tap/gofzf
+```
+
+### `go install`
+
+```console
+$ go install github.com/koki-develop/go-fzf/cmd/gofzf@latest
+```
+
+### Releases
+
+Download the binary from the [releases page](https://github.com/koki-develop/go-fzf/releases/latest).
+
+## Usage
+
+```console
+$ gofzf --help
+Usage:
+  gofzf [flags]
+
+Flags:
+  -h, --help        help for gofzf
+  -l, --limit int   maximum number of items to select (default 1)
+      --no-limit    unlimited number of items to select
+  -v, --version     version for gofzf
+```