AK: Make FlyString-to-FlyString comparison inline & trivial

This should never boil down to more than a machine word comparison.

AK/FlyString.cpp

@@ -89,11 +89,6 @@ StringView FlyString::bytes_as_string_view() const
     return m_data.bytes();
 }
 
-bool FlyString::operator==(FlyString const& other) const
-{
-    return m_data == other.m_data;
-}
-
 bool FlyString::operator==(String const& other) const
 {
     return m_data == other;

AK/FlyString.h

@@ -41,7 +41,7 @@ public:
     [[nodiscard]] ReadonlyBytes bytes() const;
     [[nodiscard]] StringView bytes_as_string_view() const;
 
-    [[nodiscard]] bool operator==(FlyString const& other) const;
+    [[nodiscard]] ALWAYS_INLINE bool operator==(FlyString const& other) const { return m_data.raw({}) == other.m_data.raw({}); }
     [[nodiscard]] bool operator==(String const&) const;
     [[nodiscard]] bool operator==(StringView) const;
     [[nodiscard]] bool operator==(char const*) const;

AK/StringBase.h

@@ -6,6 +6,7 @@
 
 #pragma once
 
+#include <AK/Badge.h>
 #include <AK/Endian.h>
 #include <AK/Forward.h>
 
@@ -70,6 +71,8 @@ public:
 
     void did_create_fly_string(Badge<FlyString>) const;
 
+    [[nodiscard]] ALWAYS_INLINE FlatPtr raw(Badge<FlyString>) const { return bit_cast<FlatPtr>(m_data); }
+
 protected:
     template<typename Func>
     ErrorOr<void> replace_with_new_string(size_t byte_count, Func&& callback)