docs(usage): update features and help information (#42)

* docs(usage): update help information

* docs(usage): update help information

* docs(usage): add features in the readme

* docs(usage): add more features

Author: shipengqi

README.md

@@ -7,10 +7,18 @@
 
 Command line utility to standardize git commit messages, golang version. Forked from [commitizen-go](https://github.com/lintingzhen/commitizen-go).
 
-The [survey](https://github.com/AlecAivazis/survey) project is no longer maintained. Therefore, this project uses [bubbletea](https://github.com/charmbracelet/bubbletea) instead.
+Fixes some issues of commitizen-go and supports more new features.
 
 ![demo](https://github.com/shipengqi/illustrations/blob/ebe8786a60c6467edb3122723d74d22f639fb216/commitizen/demo.gif?raw=true)
 
+## Features
+
+- Multi-template support
+- Dry-run support
+- Signed-off support
+- Use [bubbletea](https://github.com/charmbracelet/bubbletea) instead of [survey](https://github.com/AlecAivazis/survey) ([survey](https://github.com/AlecAivazis/survey) is no longer maintained).
+- Better unit tests.
+
 ## Getting Started
 
 ```
@@ -20,16 +28,18 @@ Usage:
   commitizen
   commitizen [command]
 
-Available Commands:   
+Available Commands:
   init        Install this tool to git-core as git-cz.
   version     Print the CLI version information.
   help        Help about any command
 
 Flags:
-  -s, --signoff   add a Signed-off-by trailer by the committer at the end of the commit log message.
-  -a, --add       tell the command to automatically stage files that have been modified and deleted, but new files you have not told Git about are not affected.
-      --dry-run   you can use the --dry-run flag to preview the message that would be committed, without really submitting it.
-  -h, --help      help for commitizen
+  -a, --add               tell the command to automatically stage files that have been modified and deleted, but new files you have not told Git about are not affected.
+  -s, --signoff           add a Signed-off-by trailer by the committer at the end of the commit log message.
+      --dry-run           you can use the --dry-run flag to preview the message that would be committed, without really submitting it.
+  -t, --template string   template name to use when multiple templates exist.
+  -d, --default           use the default template, '--default' has a higher priority than '--template'.
+  -h, --help              help for commitizen
 
 Use "commitizen [command] --help" for more information about a command.
 ```