refactor(network): Stream parse JSON response from GitHub

While working on enabling OTA for beta updates I kept running into memory issues with the JSON from GitHub. This improves the situation even for the stable OTA releases so I'm putting it up on its own.

src/network/HttpClientStream.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <Stream.h>
+#include <esp_http_client.h>
+
+#include <cstddef>
+#include <cstdint>
+
+class HttpClientStream final : public Stream {
+ public:
+  explicit HttpClientStream(esp_http_client_handle_t client, int64_t contentLength);
+
+  int available() override;
+  int read() override;
+  int peek() override;
+  size_t write(uint8_t) override;
+  size_t readBytes(char* buffer, size_t length) override;
+
+  size_t bytesReadCount() const { return bytesRead; }
+  bool hasError() const { return lastReadError < 0; }
+  int lastError() const { return lastReadError; }
+
+ private:
+  esp_http_client_handle_t client;
+  int64_t contentLength;
+  size_t bytesRead = 0;
+  int lastReadError = 0;
+  bool endOfStream = false;
+};