Text: add example (#21)

* add sample text component with rescript

* Update text.md

Co-authored-by: Max Thirouin <git@moox.io>

Author: enieber

Diff for: docs/text.md

@@ -3,3 +3,18 @@ id: text
 title: Text
 wip: true
 ---
+
+## Example
+
+```res
+open ReactNative                                                                                                          
+
+let styles = {                                                                                                            
+  open Style                                                                                                              
+  StyleSheet.create({                                                                                                     
+    "title": textStyle(~fontSize=24., ~fontWeight=#_600, ()),                                                             
+  })                                                                                                                      
+}                                                                                                                         
+
+<Text style={styles["title"]}> {"Hello World"->React.string} </Text>                                                  
+```