LibWeb/Bindings: Track generated binding includes at use sites

Replace the bindings generator's up-front dependency include scan with a
GeneratedIncludes accumulator that is threaded through the
implementation, dictionary conversion, argument conversion, and wrapping
emitters.

Emitters now add the headers required by the code they produce, while
generated headers and implementations are built into temporary builders
so includes can be collected before the prologue is emitted. This also
folds module, bindings, and iterator include handling into the same
sorted/deduped header path mechanism.

Libraries/LibIDL/Types.cpp

@@ -338,14 +338,6 @@ bool Type::is_json(Context const& context) const
     return false;
 }
 
-bool Interface::will_generate_code() const
-{
-    return !is_partial
-        && (!name.is_empty()
-            || !own_dictionaries.is_empty()
-            || !own_enumerations.is_empty());
-}
-
 void EffectiveOverloadSet::remove_all_other_entries()
 {
     Vector<Item> new_items;

Libraries/LibIDL/Types.h

@@ -234,8 +234,6 @@ public:
 
     virtual ~ParameterizedType() override = default;
 
-    void generate_sequence_from_iterable(SourceGenerator& generator, ByteString const& cpp_name, ByteString const& iterable_cpp_name, ByteString const& iterator_method_cpp_name, Context const&, size_t recursion_depth) const;
-
     Vector<NonnullRefPtr<Type const>> const& parameters() const { return m_parameters; }
     Vector<NonnullRefPtr<Type const>>& parameters() { return m_parameters; }
 
@@ -336,8 +334,6 @@ public:
     // https://webidl.spec.whatwg.org/#dfn-legacy-platform-object
     bool is_legacy_platform_object() const { return !extended_attributes.contains("Global") && (supports_indexed_properties() || supports_named_properties()); }
 
-    bool will_generate_code() const;
-
     void extend_with_partial_interface(Interface const&);
 };
 

Meta/Lagom/Tools/CodeGenerators/LibWeb/BindingsGenerator/main.cpp

@@ -157,7 +157,7 @@ ErrorOr<int> ladybird_main(Main::Arguments arguments)
         auto implementation_path = ByteString::formatted("{}.cpp", path_prefix);
 
         if constexpr (BINDINGS_GENERATOR_DEBUG) {
-            if (module->interface.has_value() && module->interface->will_generate_code())
+            if (module->interface.has_value())
                 module->interface->dump();
         }