doc/tutorial/basics: add basics tutorial
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+[TOC](Readme.md) [Prev](numberlit.md) [Next](bytes.md)
+
+# String Literals
+
+CUE stings allow a richer set of escape sequences.
+
+CUE also supports multi-line strings, enclosed by a pair of triple quotes `"""`.
+The opening quote must be followed by a newline.
+The closing quote must also be on a newline.
+The whitespace directly preceding the closing quote must match the preceding
+whitespace on all other lines and is removed from these lines.
+
+Strings may also contain [interpolations](interpolation.md).
+
+<!-- CUE editor -->
+```
+// 21-bit unicode characters
+a: "\U0001F60E" // 😎
+
+// multiline strings
+b: """
+ Hello
+ World!
+ """
+```
+
+<!-- JSON result -->
+```json
+{
+ a: "😎"
+ b: "Hello\nWorld!"
+}
+```
