Move @parity/resolc from js-revive (#296)

- Move npm package from paritytech/js-revive 
- Rename package to `@parity/resolc`

js/emscripten/examples/node/resolc.js

@@ -0,0 +1 @@
+../../../../target/wasm32-unknown-emscripten/release/resolc.js

js/emscripten/examples/node/resolc.wasm

@@ -0,0 +1 @@
+../../../../target/wasm32-unknown-emscripten/release/resolc.wasm

js/emscripten/examples/node/revive.js

@@ -0,0 +1,32 @@
+const soljson = require("solc/soljson");
+const createRevive = require("./resolc.js");
+
+async function compile(standardJsonInput) {
+  if (!standardJsonInput) {
+    throw new Error("Input JSON for the Solidity compiler is required.");
+  }
+
+  // Initialize the compiler
+  const compiler = createRevive();
+  compiler.soljson = soljson;
+
+  // Provide input to the compiler
+  compiler.writeToStdin(JSON.stringify(standardJsonInput));
+
+  // Run the compiler
+  compiler.callMain(["--standard-json"]);
+
+  // Collect output
+  const stdout = compiler.readFromStdout();
+  const stderr = compiler.readFromStderr();
+
+  // Check for errors and throw if stderr exists
+  if (stderr) {
+    throw new Error(`Compilation failed: ${stderr}`);
+  }
+
+  // Return the output if no errors
+  return stdout;
+}
+
+module.exports = { compile };

js/emscripten/examples/node/run_revive.js

@@ -0,0 +1,38 @@
+const { compile } = require("./revive.js");
+
+const compilerStandardJsonInput = {
+  language: "Solidity",
+  sources: {
+    "MyContract.sol": {
+      content: `
+          // SPDX-License-Identifier: UNLICENSED
+          pragma solidity ^0.8.0;
+          contract MyContract {
+            function greet() public pure returns (string memory) {
+              return "Hello";
+            }
+          }
+        `,
+    },
+  },
+  settings: {
+    optimizer: {
+      enabled: true,
+      runs: 200,
+    },
+    outputSelection: {
+      "*": {
+        "*": ["abi"],
+      },
+    },
+  },
+};
+
+async function runCompiler() {
+  let output = await compile(compilerStandardJsonInput);
+  console.log("Output: " + output);
+}
+
+runCompiler().catch((err) => {
+  console.error("Error:", err);
+});