Add Disclaimer to Explorer and web3js (#18820)

* Add Disclaimer to Explorer

* Add disclaimer to Web3js

web3.js/README.md

@@ -114,3 +114,44 @@ and [npmjs.com](https://www.npmjs.com/package/@solana/web3.js)
 Each Github release features a tarball containing API documentation and a
 minified version of the module suitable for direct use in a browser environment
 (`<script>` tag)
+
+## Disclaimer
+
+All claims, content, designs, algorithms, estimates, roadmaps,
+specifications, and performance measurements described in this project
+are done with the Solana Foundation's ("SF") best efforts. It is up to
+the reader to check and validate their accuracy and truthfulness.
+Furthermore nothing in this project constitutes a solicitation for
+investment.
+
+Any content produced by SF or developer resources that SF provides, are
+for educational and inspiration purposes only. SF does not encourage,
+induce or sanction the deployment, integration or use of any such
+applications (including the code comprising the Solana blockchain
+protocol) in violation of applicable laws or regulations and hereby
+prohibits any such deployment, integration or use. This includes use of
+any such applications by the reader (a) in violation of export control
+or sanctions laws of the United States or any other applicable
+jurisdiction, (b) if the reader is located in or ordinarily resident in
+a country or territory subject to comprehensive sanctions administered
+by the U.S. Office of Foreign Assets Control (OFAC), or (c) if the
+reader is or is working on behalf of a Specially Designated National
+(SDN) or a person subject to similar blocking or denied party
+prohibitions.
+
+The reader should be aware that U.S. export control and sanctions laws
+prohibit U.S. persons (and other persons that are subject to such laws)
+from transacting with persons in certain countries and territories or
+that are on the SDN list. As a project based primarily on open-source
+software, it is possible that such sanctioned persons may nevertheless
+bypass prohibitions, obtain the code comprising the Solana blockchain
+protocol (or other project code or applications) and deploy, integrate,
+or otherwise use it. Accordingly, there is a risk to individuals that
+other persons using the Solana blockchain protocol may be sanctioned
+persons and that transactions with such persons would be a violation of
+U.S. export controls and sanctions law. This risk applies to
+individuals, organizations, and other ecosystem participants that
+deploy, integrate, or use the Solana blockchain protocol code directly
+(e.g., as a node operator), and individuals that transact on the Solana
+blockchain through light clients, third party interfaces, and/or wallet
+software.