Basics of library.

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diff --git a/source/fud_utf8_iterator.cpp b/source/fud_utf8_iterator.cpp
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+/*
+ * libfud
+ * Copyright 2024 Dominick Allen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "fud_utf8_iterator.hpp"
+
+namespace fud {
+
+std::optional<FudUtf8> Utf8Iterator::peek() const
+{
+    if (m_index >= m_view.length()) {
+        return std::nullopt;
+    }
+
+    auto utf8 = FudUtf8::fromStringView(m_view, m_index);
+
+    if (!utf8.valid()) {
+        return std::nullopt;
+    }
+
+    return utf8;
+}
+
+std::optional<FudUtf8> Utf8Iterator::next()
+{
+    if (m_index >= m_view.length()) {
+        m_index = m_view.length();
+        return std::nullopt;
+    }
+
+    auto utf8 = FudUtf8::fromStringView(m_view, m_index);
+
+    if (!utf8.valid()) {
+        m_index = m_view.length();
+        return std::nullopt;
+    }
+
+    m_index += utf8.size();
+    return utf8;
+}
+
+} // namespace fud