plugins: added nvm and sdkman (#150)

* feat(plugins): added sdkman plugin

* feat(plugins): added nvm plugin

* fix: fixed the codacy issues

plugins/sdkman/README.md

@@ -0,0 +1,25 @@
+# sdkman plugin
+
+This plugin automatically source sdkman[1]
+
+## Installation
+
+### Install sdkman
+
+Lets install[2] the sdkman without updaing shell config!
+
+```bash
+$ curl -s "https://get.sdkman.io?rcupdate=false" | bash
+```
+
+### Include sdkman as plugin
+
+```bash
+plugins=(
+  git
+  sdkman
+)
+```
+
+[1]: https://sdkman.io/
+[2]: https://sdkman.io/install