feat: solidity code for faucet smart contract

.gitignore

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+artifacts/

.gitmodules

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+[submodule "web"]
+	path = web
+	url = https://gitea.snsd0805.com/snsd0805/faucet_web.git

Faucet.sol

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+pragma solidity ^0.4.25;
+
+contract Faucet {
+    function withdraw(uint withdraw_amount) public {
+        require(withdraw_amount <= 1000000000000000);
+        msg.sender.transfer(withdraw_amount);
+    }
+    
+    function () public payable {}
+}

web

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+Subproject commit bce3825c4837e8d507ce086e929e36e00003bc8e