feat(doc): Improve terminal printer (#6594)

- Add more support for generics
- Add the --private flag - displays documentation for
  not exported and private nodes
- Display more attributes like abstract, static and readonly
- Display type aliases
- Refactor module to use the Display trait
- Use a bit more color

cli/doc/function.rs

@@ -1,5 +1,6 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 use super::params::pat_to_param_def;
+use super::parser::DocParser;
 use super::ts_type::ts_type_ann_to_def;
 use super::ts_type::TsTypeDef;
 use super::ts_type_param::maybe_type_param_decl_to_type_param_defs;
@@ -20,12 +21,14 @@ pub struct FunctionDef {
 }
 
 pub fn function_to_function_def(
+  doc_parser: &DocParser,
   function: &swc_ecma_ast::Function,
 ) -> FunctionDef {
   let mut params = vec![];
 
   for param in &function.params {
-    let param_def = pat_to_param_def(&param.pat);
+    let param_def =
+      pat_to_param_def(&param.pat, Some(&doc_parser.ast_parser.source_map));
     params.push(param_def);
   }
 
@@ -47,9 +50,10 @@ pub fn function_to_function_def(
 }
 
 pub fn get_doc_for_fn_decl(
+  doc_parser: &DocParser,
   fn_decl: &swc_ecma_ast::FnDecl,
 ) -> (String, FunctionDef) {
   let name = fn_decl.ident.sym.to_string();
-  let fn_def = function_to_function_def(&fn_decl.function);
+  let fn_def = function_to_function_def(&doc_parser, &fn_decl.function);
   (name, fn_def)
 }