Reorganize directory structure (#825)

* Remove docs folder.

This was a redirect from a GitHub pages site that does not appear
to be in use.

* Rename api folder to api-samples.

* Move examples to functional-samples folder.

* Move cookbook sample to functional-samples.

* Move tutorials to functional-samples folder.

* Move mv2 and apps folders to _archive.

* Rename tools folder to .repo.

* Move reference folder to functional-samples.

* Update README.

Update README with new relative links for reorg.

* Update README.md

Co-authored-by: amysteamdev <37001393+AmySteam@users.noreply.github.com>

---------

Co-authored-by: amysteamdev <37001393+AmySteam@users.noreply.github.com>

README.md

@@ -5,21 +5,19 @@ Note that Chrome Apps are deprecated. Learn more [on the Chromium blog](https://
 
 For more information on extensions, see [Chrome Developers](https://developer.chrome.com).
 
-**Note: Samples for Manifest V3 are still being prepared. In the mean time, consider referring to [mv2-archive/](mv2-archive/).**
+**Note: Samples for Manifest V3 are still being prepared. In the mean time, consider referring to [_archive/mv2/](_archive/mv2/).**
 
 ## Samples
 
 The directory structure is as follows:
 
-* [api/](api/) - extensions focused on a single API package
-* (To be added) [howto/](mv2-archive/howto/) - extensions that show how to perform a particular task
-* [tutorials/](tutorials/) - multi-step walkthroughs referenced inline in the docs
-* [examples/](examples/) - full featured extensions spanning multiple API packages
-* [apps/](apps/) - deprecated Chrome Apps platform (not listed below)
-* [mv2-archive/](mv2-archive/) - resources for manifest version 2
+* [api-samples/](api-samples/) - extensions focused on a single API package
+* [functional-samples/](functional-samples/) - full featured extensions spanning multiple API packages
+* [_archive/apps/](_archive/apps/) - deprecated Chrome Apps platform (not listed below)
+* [_archive/mv2/](_archive/mv2/) - resources for manifest version 2
 
 To experiment with these samples, please clone this repo and use 'Load Unpacked Extension'.
-Read more on [Getting Started](https://developer.chrome.com/extensions/getstarted).
+Read more on [Development Basics](https://developer.chrome.com/docs/extensions/mv3/getstarted/development-basics/#load-unpacked).
 
 <table>
   <thead>
@@ -32,7 +30,7 @@ Read more on [Getting Started](https://developer.chrome.com/extensions/getstarte
     <tr>
       <td style="vertical-align:top;">
         Hello Extensions<br>
-        <a href="tutorials/hello-world"><code>tutorials/hello-world</code></a>
+        <a href="functional-samples/tutorial.hello-world"><code>tutorial.hello-world</code></a>
       </td>
       <td  style="vertical-align:top;">
         <ul>
@@ -43,7 +41,7 @@ Read more on [Getting Started](https://developer.chrome.com/extensions/getstarte
     <tr>
       <td style="vertical-align:top;">
         Page Redder <br>
-        <a href="examples/page-redder"><code>examples/page-redder</code></a>
+        <a href="functional-samples/sample.page-redder"><code>sample.page-redder</code></a>
       </td>
       <td  style="vertical-align:top;">
         <ul>
@@ -55,7 +53,7 @@ Read more on [Getting Started](https://developer.chrome.com/extensions/getstarte
     <tr>
       <td style="vertical-align:top;">
          My Bookmarks <br>
-        <a href="examples/bookmarks"><code>examples/bookmarks</code></a>
+        <a href="functional-samples/sample.bookmarks"><code>sample.bookmarks</code></a>
       </td>
       <td  style="vertical-align:top;">
         <ul>
@@ -69,7 +67,7 @@ Read more on [Getting Started](https://developer.chrome.com/extensions/getstarte
     <tr>
       <td style="vertical-align:top;">
          Chromium Milestones<br>
-        <a href="examples/milestones"><code>examples/milestones</code></a>
+        <a href="functional-samples/sample.milestones"><code>sample.milestones</code></a>
       </td>
       <td  style="vertical-align:top;">
         <ul>
@@ -81,7 +79,7 @@ Read more on [Getting Started](https://developer.chrome.com/extensions/getstarte
     <tr>
       <td style="vertical-align:top;">
         Cookie Clearer <br>
-        <a href="api/cookies/cookie-clearer"><code>api/cookies/cookie-clearer</code></a>
+        <a href="api-samples/cookies/cookie-clearer"><code>api-samples/cookies/cookie-clearer</code></a>
       </td>
       <td  style="vertical-align:top;">
         <ul>
@@ -94,7 +92,7 @@ Read more on [Getting Started](https://developer.chrome.com/extensions/getstarte
     <tr>
       <td style="vertical-align:top;">
         Omnibox - New Tab Search <br>
-        <a href="api/omnibox/new-tab-search"><code>api/omnibox/new-tab-search</code></a>
+        <a href="api-samples/omnibox/new-tab-search"><code>api-samples/omnibox/new-tab-search</code></a>
       </td>
       <td  style="vertical-align:top;">
         <ul>
@@ -106,7 +104,7 @@ Read more on [Getting Started](https://developer.chrome.com/extensions/getstarte
     <tr>
       <td style="vertical-align:top;">
         Web Accessible Resources <br>
-        <a href="api/web-accessible-resources"><code>api/web-accessible-resources</code></a>
+        <a href="api-samples/web-accessible-resources"><code>api-samples/web-accessible-resources</code></a>
       </td>
       <td style="vertical-align:top;">
         <ul>