Add 1.x deprecation notice (#6723)

* add Maintenance notes

* add links

Author: avkos

README.md

@@ -1,3 +1,18 @@
+## Maintenance Countdown:
+Commencing from January 1, 2024, a 90-day countdown has been initiated, signaling the transition of Web3.js version 1.x into an end-of-maintenance phase.
+
+### Timeline of Changes:
+
+- 90-Day Countdown (1/1/24 - 3/31/24):
+  During this period, we strongly encourage users to plan accordingly and initiate the [upgrade to Web3.js version 4.x](https://docs.web3js.org/guides/web3_upgrade_guide/x/)
+
+- No New Bug Fixes (4/1/24 onwards):
+  Starting April 1, 2024, new bug fixes for Web3.js version 1.x will no longer be provided. To benefit from continued support and access to new features, we recommend [upgrading to Web3.js version 4.x](https://docs.web3js.org/guides/web3_upgrade_guide/x/)
+
+- End of Security Fixes (7/1/24):
+  Security fixes for Web3.js version 1.x will be discontinued from July 1, 2024. [Upgrading to Web3.js version 4.x](https://docs.web3js.org/guides/web3_upgrade_guide/x/) is crucial to ensure the security of your applications.
+
+
 <p style="text-align: center;">
   <img src="assets/logo/web3js.jpg" width="200" alt="web3.js">
 </p>

docs/index.rst

@@ -1,3 +1,19 @@
+=================================
+Maintenance Countdown:
+=================================
+
+Commencing from January 1, 2024, a 90-day countdown has been initiated, signaling the transition of Web3.js version 1.x into an end-of-maintenance phase.
+
+---------------------
+Timeline of Changes:
+---------------------
+
+- 90-Day Countdown (1/1/24 - 3/31/24): During this period, we strongly encourage users to plan accordingly and initiate the `upgrade to Web3.js version 4.x <https://docs.web3js.org/guides/web3_upgrade_guide/x/>`_
+
+- No New Bug Fixes (4/1/24 onwards): Starting April 1, 2024, new bug fixes for Web3.js version 1.x will no longer be provided. To benefit from continued support and access to new features, we recommend `upgrading to Web3.js version 4.x <https://docs.web3js.org/guides/web3_upgrade_guide/x/>`_
+
+- End of Security Fixes (7/1/24): Security fixes for Web3.js version 1.x will be discontinued from July 1, 2024. `Upgrading to Web3.js version 4.x <https://docs.web3js.org/guides/web3_upgrade_guide/x/>`_ is crucial to ensure the security of your applications
+
 
 =================================
 web3.js - Ethereum JavaScript API
@@ -7,7 +23,7 @@ web3.js is a collection of libraries that allow you to interact with a local or
 
 The following documentation will guide you through :ref:`installing and running web3.js <adding-web3>` as well as providing an :ref:`API reference documentation <#id1>` with examples.
 
-.. note:: `Web3.js 4.x <https://www.npmjs.com/package/web3>`_ has been released. Checkout 4.x `API documentation and migration guide <https://docs.web3js.org/>`_ . 
+.. note:: `Web3.js 4.x <https://www.npmjs.com/package/web3>`_ has been released. Checkout 4.x `API documentation and migration guide <https://docs.web3js.org/>`_ .
 
 Contents:
 
@@ -42,4 +58,4 @@ Contents:
     web3-admin
 
 
-Special thanks to `Netlify <https://www.netlify.com/>`_ for providing build and deploy services for our end-to-end integration tests.
+Special thanks to `Netlify <https://www.netlify.com/>`_ for providing build and deploy services for our end-to-end integration tests.