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

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

js/emscripten/embed/pre.js

@@ -0,0 +1,57 @@
+Module.stdinData = null;
+Module.stdinDataPosition = 0;
+Module.stdoutData = [];
+Module.stderrData = [];
+
+// Method to read all collected stdout data
+Module.readFromStdout = function () {
+  if (!Module.stdoutData.length) return "";
+  const decoder = new TextDecoder("utf-8");
+  const data = decoder.decode(new Uint8Array(Module.stdoutData));
+  Module.stdoutData = [];
+  return data;
+};
+
+// Method to read all collected stderr data
+Module.readFromStderr = function () {
+  if (!Module.stderrData.length) return "";
+  const decoder = new TextDecoder("utf-8");
+  const data = decoder.decode(new Uint8Array(Module.stderrData));
+  Module.stderrData = [];
+  return data;
+};
+
+// Method to write data to stdin
+Module.writeToStdin = function (data) {
+  const encoder = new TextEncoder();
+  Module.stdinData = encoder.encode(data);
+  Module.stdinDataPosition = 0;
+};
+
+// Override the `preRun` method to customize file system initialization
+Module.preRun = Module.preRun || [];
+Module.preRun.push(function () {
+  // Custom stdin function
+  function customStdin() {
+    if (
+      !Module.stdinData ||
+      Module.stdinDataPosition >= Module.stdinData.length
+    ) {
+      return null; // End of input (EOF)
+    }
+    return Module.stdinData[Module.stdinDataPosition++];
+  }
+
+  // Custom stdout function
+  function customStdout(char) {
+    Module.stdoutData.push(char);
+  }
+
+  // Custom stderr function
+  function customStderr(char) {
+    Module.stderrData.push(char);
+  }
+
+  // Initialize the FS (File System) with custom handlers
+  FS.init(customStdin, customStdout, customStderr);
+});

js/emscripten/embed/soljson_interface.js

@@ -0,0 +1,34 @@
+mergeInto(LibraryManager.library, {
+  soljson_compile: function (inputPtr, inputLen) {
+    const inputJson = UTF8ToString(inputPtr, inputLen);
+    const output = Module.soljson.cwrap("solidity_compile", "string", [
+      "string",
+    ])(inputJson);
+    return stringToNewUTF8(output);
+  },
+  soljson_version: function () {
+    const version = Module.soljson.cwrap("solidity_version", "string", [])();
+    return stringToNewUTF8(version);
+  },
+  resolc_compile: function (inputPtr, inputLen) {
+    const inputJson = UTF8ToString(inputPtr, inputLen);
+    var revive = createRevive();
+    revive.writeToStdin(inputJson);
+
+    // Call main on the new instance
+    const result = revive.callMain(["--recursive-process"]);
+
+    if (result) {
+      const stderrString = revive.readFromStderr();
+      const error = JSON.stringify({
+        type: "error",
+        message: stderrString || "Unknown error",
+      });
+      return stringToNewUTF8(error);
+    } else {
+      const stdoutString = revive.readFromStdout();
+      const json = JSON.stringify({ type: "success", data: stdoutString });
+      return stringToNewUTF8(json);
+    }
+  },
+});