Import ESP_UniClock (upstream 1189810)

Vendored from https://github.com/gpeter62/ESP_UniClock: the sketch
source, the web UI and the libraries the ESP8266 build needs, unpacked
from the bundled zips. Adds a PlatformIO project for the ESP-12. The
source is unchanged; local changes follow as separate commits.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

firmware/uniclock/lib/ArduinoJson/extras/tests/Misc/deprecated.cpp

@@ -0,0 +1,115 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2022, Benoit BLANCHON
+// MIT License
+
+#define ARDUINOJSON_DEPRECATED(msg)  // nothing
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("Deprecated features") {
+  StaticJsonDocument<256> doc;
+  const char* s = "hello";
+  doc["s"] = s;
+  doc["c"] = 42;
+  doc["a"].add(s);
+  doc["a"].add(42);
+
+  SECTION("JsonVariant::add(char)") {
+    JsonVariant v = doc.to<JsonVariant>();
+    v.add('*');
+    REQUIRE(v[0] == 42);
+  }
+
+  SECTION("JsonVariant::as<char*>()") {
+    JsonVariant v = doc["s"];
+    REQUIRE(v.as<char*>() == s);
+  }
+
+  SECTION("JsonVariant::as<char>()") {
+    JsonVariant v = doc["c"];
+    REQUIRE(v.as<char>() == '*');
+  }
+
+  SECTION("JsonVariant::is<char*>()") {
+    JsonVariant v = doc["s"];
+    REQUIRE(v.is<char*>() == true);
+  }
+
+  SECTION("JsonVariant::is<char>()") {
+    JsonVariant v = doc["c"];
+    REQUIRE(v.is<char>() == true);
+  }
+
+  SECTION("JsonVariant::set(char)") {
+    JsonVariant v = doc.to<JsonVariant>();
+    v.set('*');
+    REQUIRE(v.as<unsigned char>() == 42);
+  }
+
+  SECTION("JsonVariantConst::as<char*>()") {
+    JsonVariantConst v = doc["s"];
+    REQUIRE(v.as<char*>() == s);
+  }
+
+  SECTION("JsonVariantConst::as<char>()") {
+    JsonVariantConst v = doc["c"];
+    REQUIRE(v.as<char>() == '*');
+  }
+
+  SECTION("JsonVariantConst::is<char*>()") {
+    JsonVariantConst v = doc["s"];
+    REQUIRE(v.is<char*>() == true);
+  }
+
+  SECTION("JsonVariantConst::is<char>()") {
+    JsonVariantConst v = doc["c"];
+    REQUIRE(v.is<char>() == true);
+  }
+
+  SECTION("MemberProxy::as<char*>()") {
+    REQUIRE(doc["s"].as<char*>() == s);
+  }
+
+  SECTION("MemberProxy::as<char>()") {
+    REQUIRE(doc["c"].as<char>() == '*');
+  }
+
+  SECTION("MemberProxy::as<char>()") {
+    doc["x"].set('*');
+    REQUIRE(doc["x"] == 42);
+  }
+
+  SECTION("MemberProxy::is<char*>()") {
+    REQUIRE(doc["s"].is<char*>() == true);
+    REQUIRE(doc["c"].is<char*>() == false);
+  }
+
+  SECTION("MemberProxy::is<char>()") {
+    REQUIRE(doc["c"].is<char>() == true);
+    REQUIRE(doc["s"].is<char>() == false);
+  }
+
+  SECTION("ElementProxy::as<char*>()") {
+    REQUIRE(doc["a"][0].as<char*>() == s);
+  }
+
+  SECTION("ElementProxy::as<char>()") {
+    REQUIRE(doc["a"][1].as<char>() == '*');
+  }
+
+  SECTION("ElementProxy::as<char>()") {
+    doc["a"][0].set('*');
+    REQUIRE(doc["a"][0] == 42);
+  }
+
+  SECTION("ElementProxy::is<char*>()") {
+    REQUIRE(doc["a"][0].is<char*>() == true);
+    REQUIRE(doc["a"][1].is<char*>() == false);
+  }
+
+  SECTION("ElementProxy::is<char>()") {
+    REQUIRE(doc["a"][1].is<char>() == true);
+    REQUIRE(doc["a"][0].is<char>() == false);
+  }
+}