Added README Files For Tutorials (#1371)

* tutorials redme

* update 404 URLs

* tutorials redme

* readme files

* readme

* readme

* Update functional-samples/tutorial.getting-started/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* url change not required

* Update functional-samples/tutorial.tabs-manager/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* Update README.md

* Update functional-samples/tutorial.tabs-manager/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* Update functional-samples/tutorial.hello-world/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* Update functional-samples/tutorial.getting-started/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* Update functional-samples/tutorial.hello-world/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* Update functional-samples/tutorial.getting-started/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* Update functional-samples/tutorial.getting-started/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* Update functional-samples/tutorial.getting-started/README.md

Co-authored-by: Oliver Dunk <[email protected]>

* foxed typo for tabGroups

* Fixed typo for tabGroups

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Co-authored-by: Oliver Dunk <[email protected]>

functional-samples/tutorial.getting-started/README.md

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+# Getting Started With Google Chrome Extensions
+
+This is an extension used in the [Debug extensions][1] tutorial. It changes the HTML body background color of the active tab.
+The purpose of this extension is to demonstrate how to create a simple Chrome Extension that uses the `default_popup`, `options_page` and `service_worker` manifest keys and `storage` and `tabs` APIs.
+
+ ## Running This Extension
+
+1. Clone this repository.
+2. Load this directory in Chrome as an [unpacked extension][2].
+3. Go to https://developer.chrome.com/docs/extensions/get-started/tutorial/debug or any web page.
+4. Click the extension icon in the Chrome toolbar, then click the three dots next to the "Getting Started Example" extension and select "Options".
+5. On the Options page, choose a color.
+6. Afterward, click the extension icon again, and the page's background color will change when you click the button in the extension popup.
+
+[1]: https://developer.chrome.com/docs/extensions/get-started/tutorial/debug
+[2]: https://developer.chrome.com/docs/extensions/mv3/getstarted/development-basics/#load-unpacked

functional-samples/tutorial.hello-world/README.md

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+# Getting Started With Google Chrome Extensions (Hello World)
+
+This example demonstrates how to create a simple "Hello World" Chrome Extension.
+For more details, visit the [official tutorial](https://developer.chrome.com/docs/extensions/get-started/tutorial/hello-world).
+
+## Running This Extension
+
+1. Clone this repository.
+2. Load this directory in Chrome as an [unpacked extension](https://developer.chrome.com/docs/extensions/mv3/getstarted/development-basics/#load-unpacked).
+3. Click the extension icon in the Chrome toolbar, then select the "Hello Extensions" extension. A popup will appear displaying the text "Hello Extensions".

functional-samples/tutorial.tabs-manager/README.md

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+# Tab Manager For Chrome Dev Docs
+
+This Chrome extension helps you manage and group your tabs related to Google Chrome Developer documentation. It organizes tabs into a group titled "DOCS" for easier navigation and enhanced productivity.
+
+Purpose of this extension is to demonstrate [chrome.tabGroups](https://developer.chrome.com/docs/extensions/reference/api/tabGroups) API to interact with the browser's tab grouping system.
+
+ ## Running This Extension
+
+1. Clone this repository.
+2. Load this directory in Chrome as an [unpacked extension](https://developer.chrome.com/docs/extensions/mv3/getstarted/development-basics/#load-unpacked).
+3. Open these two URLs in separate tabs:  
+   - [https://developer.chrome.com/docs/extensions](https://developer.chrome.com/docs/extensions)  
+   - [https://developer.chrome.com/docs/extensions/reference/api](https://developer.chrome.com/docs/extensions/reference/api)
+4. Click the extension icon in the Chrome toolbar, then select the "Tab Manager for Chrome Dev Docs" extension. A popup will appear having title "Google Dev Docs" and button named "Group Tabs". Click on the button to group the two tabs.