feat: add last contributor to each document (#980)

* add contributor list to each document

* handle case where there is no github repo

* Move to v1

* Revert "handle case where there is no github repo"

This reverts commit a76a887901.

* Revert "add contributor list to each document"

This reverts commit c0cc79f995.

* Add last updated by field

* -Include enableUpdateBy in the config
- Rename css class to be more general

* Fix lint

* Refactor :
- s/getGitlastupdated/getGitLastUpdatedTime
- refactor part in getGitLastUpdated[Time|By] that overlaps
- remove getAuthorInformation

* -Modify the display logic
-Refactor the utils, combine lastupdatedtime and lastupdatedby
-Replace the test

* Modify docs based on the display change

* Update docs for url and baseurl

For more clarity and to make relationship more clear

* Update support for Web App Manifest (#1046)

* misc: update nits

* misc: update nits

v1/examples/basics/siteConfig.js

@@ -92,6 +92,12 @@ const siteConfig = {
   ogImage: 'img/docusaurus.png',
   twitterImage: 'img/docusaurus.png',
 
+  // Show documentation's last contributor's name.
+  // enableUpdateBy: true,
+
+  // Show documentation's last update time.
+  // enableUpdateTime: true,
+
   // You may provide arbitrary config keys to be used as needed by your
   // template. For example, if you need your repo's URL...
   //   repoUrl: 'https://github.com/facebook/test-site',