feat(debugger): integrate NX Tcl Remote Debugger into NX Postprocessor

Embed the NX Tcl Remote Debugger into the NX Postprocessor extension.
Add a new debugging client, protocol, and adapter logic to
drive attach/launch, breakpoints, stepping, and evaluation
via the runtime adapter.

- Introduced a client debugger with a new adapter and protocol
- Wired attach/launch, breakpoints, stepping, and evaluation
- Updated docs and licensing to reflect the embedded debugger

client/src/debugger/inlineAdapter.js

@@ -0,0 +1,68 @@
+'use strict';
+
+const { PassThrough } = require('node:stream');
+const { NxDebugAdapter } = require('./debugAdapter');
+
+function frameMessage(message) {
+  const json = JSON.stringify(message);
+  return `Content-Length: ${Buffer.byteLength(json, 'utf8')}\r\n\r\n${json}`;
+}
+
+class NxInlineDebugAdapter {
+  constructor() {
+    this.input = new PassThrough();
+    this.output = new PassThrough();
+    this.outputBuffer = Buffer.alloc(0);
+    this.listeners = new Set();
+    this.disposed = false;
+
+    this.onDidSendMessage = (listener, thisArgs, disposables) => {
+      const registration = { listener, thisArgs };
+      this.listeners.add(registration);
+      const disposable = {
+        dispose: () => this.listeners.delete(registration),
+      };
+      if (Array.isArray(disposables)) disposables.push(disposable);
+      return disposable;
+    };
+
+    this.output.on('data', (chunk) => this.onOutput(chunk));
+    this.adapter = new NxDebugAdapter(this.input, this.output);
+  }
+
+  handleMessage(message) {
+    if (!this.disposed) this.input.write(frameMessage(message));
+  }
+
+  onOutput(chunk) {
+    this.outputBuffer = Buffer.concat([this.outputBuffer, chunk]);
+    while (true) {
+      const headerEnd = this.outputBuffer.indexOf('\r\n\r\n');
+      if (headerEnd < 0) return;
+      const header = this.outputBuffer.subarray(0, headerEnd).toString('ascii');
+      const match = /Content-Length:\s*(\d+)/i.exec(header);
+      if (!match) throw new Error('missing DAP Content-Length header from NX adapter');
+      const contentLength = Number(match[1]);
+      const messageEnd = headerEnd + 4 + contentLength;
+      if (this.outputBuffer.length < messageEnd) return;
+
+      const payload = this.outputBuffer.subarray(headerEnd + 4, messageEnd).toString('utf8');
+      this.outputBuffer = this.outputBuffer.subarray(messageEnd);
+      const message = JSON.parse(payload);
+      for (const { listener, thisArgs } of [...this.listeners]) {
+        listener.call(thisArgs, message);
+      }
+    }
+  }
+
+  dispose() {
+    if (this.disposed) return;
+    this.disposed = true;
+    this.adapter.dispose();
+    this.input.end();
+    this.output.destroy();
+    this.listeners.clear();
+  }
+}
+
+module.exports = { NxInlineDebugAdapter, frameMessage };