feat(UrlUtils): Resolve more URL formats

Resolves more formats of URLs correctly: absolute, root-relative, relative, parent-relative, and URLs with query strings and fragments.

test/run_url_utils_test.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+BUILD_DIR="$ROOT_DIR/build/url_utils"
+BINARY="$BUILD_DIR/UrlUtilsTest"
+PLATFORMIO_DIR="${PLATFORMIO_CORE_DIR:-$HOME/.platformio}"
+ARDUINO_FRAMEWORK_DIR="$PLATFORMIO_DIR/packages/framework-arduinoespressif32"
+
+mkdir -p "$BUILD_DIR"
+
+SOURCES=(
+  "$ROOT_DIR/test/url_utils/UrlUtilsTest.cpp"
+  "$ROOT_DIR/src/util/UrlUtils.cpp"
+)
+
+CXXFLAGS=(
+  -std=c++20
+  -O2
+  -Wall
+  -Wextra
+  -pedantic
+  -fno-exceptions
+  -DARDUINO_USB_MODE=1
+  -DARDUINO_USB_CDC_ON_BOOT=1
+  -DDESTRUCTOR_CLOSES_FILE=1
+  -I"$ROOT_DIR/test/shims"
+  -I"$ROOT_DIR"
+  -I"$ROOT_DIR/src"
+  -I"$ARDUINO_FRAMEWORK_DIR/cores/esp32"
+  -I"$ARDUINO_FRAMEWORK_DIR/variants/esp32c3"
+)
+
+c++ "${CXXFLAGS[@]}" "${SOURCES[@]}" -o "$BINARY"
+
+"$BINARY" "$@"