Document import type

Closes #61

src/content/chapter0_basics/lesson14_type_imports/code.gleam

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+import gleam/bytes_builder
+import gleam/string_builder.{type StringBuilder}
+
+pub fn main() {
+  // Referring to a type in a qualified way
+  let _bytes: bytes_builder.BytesBuilder = bytes_builder.new()
+
+  // Refering to a type in an unqualified way
+  let _text: StringBuilder = string_builder.new()
+}

src/content/chapter0_basics/lesson14_type_imports/en.html

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+<p>
+  Other modules may also define types that we wish to refer to. In this case we
+  need to import them.
+</p>
+<p>
+  Like functions types can be referred to in a <em>qualified</em> way by putting
+  the imported module name and a dot before the type name. For example,
+  <code>bytes_builder.BytesBuilder</code>
+</p>
+<p>
+  Types can also be imported in an <em>unqualified</em> way by listing them in
+  the import statement with the word <code>type</code> before the type name.
+</p>
+<p>
+  It is more common in Gleam code for types to be imported in an unqualified way
+  than it is for funtions to be imported in an unqualified way.
+</p>