add zsh

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diff --git a/oh-my-zsh/plugins/encode64/README.md b/oh-my-zsh/plugins/encode64/README.md
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+# encode64
+
+Alias plugin for encoding or decoding using `base64` command.
+
+To use it, add `encode64` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... encode64)
+```
+
+## Functions and Aliases
+
+| Function       | Alias  | Description                            |
+| -------------- | ------ | -------------------------------------- |
+| `encode64`     | `e64`  | Encodes given data to base64           |
+| `encodefile64` | `ef64` | Encodes given file's content to base64 |
+| `decode64`     | `d64`  | Decodes given data from base64         |
+
+## Usage and examples
+
+### Encoding
+
+- From parameter
+
+  ```console
+  $ encode64 "oh-my-zsh"
+  b2gtbXktenNo
+  $ e64 "oh-my-zsh"
+  b2gtbXktenNo
+  ```
+
+- From piping
+
+  ```console
+  $ echo "oh-my-zsh" | encode64
+  b2gtbXktenNo==
+  $ echo "oh-my-zsh" | e64
+  b2gtbXktenNo==
+  ```
+
+### Encoding a file
+
+Encode a file's contents to base64 and save output to text file.  
+**NOTE:** Takes provided file and saves encoded content as new file with `.txt` extension
+
+- From parameter
+
+  ```console
+  $ encodefile64 ohmyzsh.icn
+  ohmyzsh.icn's content encoded in base64 and saved as ohmyzsh.icn.txt
+  $ ef64 "oh-my-zsh"
+  ohmyzsh.icn's content encoded in base64 and saved as ohmyzsh.icn.txt
+  ```
+
+### Decoding
+
+- From parameter
+
+  ```console
+  $ decode64 b2gtbXktenNo
+  oh-my-zsh%
+  $ d64 b2gtbXktenNo
+  oh-my-zsh%
+  ```
+
+- From piping
+
+  ```console
+  $ echo "b2gtbXktenNoCg==" | decode64
+  oh-my-zsh
+  $ echo "b2gtbXktenNoCg==" | d64
+  oh-my-zsh
+  ```
diff --git a/oh-my-zsh/plugins/encode64/encode64.plugin.zsh b/oh-my-zsh/plugins/encode64/encode64.plugin.zsh
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+encode64() {
+    if [[ $# -eq 0 ]]; then
+        cat | base64
+    else
+        printf '%s' $1 | base64
+    fi
+}
+
+encodefile64() {
+    if [[ $# -eq 0 ]]; then
+        echo "You must provide a filename"
+    else
+        base64 -i $1 -o $1.txt
+        echo "${1}'s content encoded in base64 and saved as ${1}.txt"
+    fi
+}
+
+decode64() {
+    if [[ $# -eq 0 ]]; then
+        cat | base64 --decode
+    else
+        printf '%s' $1 | base64 --decode
+    fi
+}
+alias e64=encode64
+alias ef64=encodefile64
+alias d64=decode64