Added tokei.rs badge (#112)

[![lines of
code](https://tokei.rs/b1/github/databrickslabs/sandbox)]([https://codecov.io/github/databrickslabs/sandbox](https://github.com/databrickslabs/sandbox))

Author: nfx

README.md

@@ -1,4 +1,7 @@
 # ![Databricks Labs Sandbox](./docs/logo-no-background.svg)
+
+[![lines of code](https://tokei.rs/b1/github/databrickslabs/sandbox)]([https://codecov.io/github/databrickslabs/sandbox](https://github.com/databrickslabs/sandbox))
+
 Experimental and low-maturity scripts
 
 ## Installation
@@ -19,4 +22,4 @@ databricks labs upgrade sandbox
 
 Please note the code in this project is provided for your exploration only, and are not formally supported by Databricks with Service Level Agreements (SLAs). They are provided AS-IS and we do not make any guarantees of any kind. Please do not submit a support ticket relating to any issues arising from the use of these projects. The source in this project is provided subject to the [Databricks License](./LICENSE). All included or referenced third party libraries are subject to the licenses set forth below.
 
-Any issues discovered through the use of this project should be filed as GitHub Issues on the Repo. They will be reviewed as time permits, but there are no formal SLAs for support. 
+Any issues discovered through the use of this project should be filed as GitHub Issues on the Repo. They will be reviewed as time permits, but there are no formal SLAs for support.