Scripting begins!

Hefty document with all the details of what's implemented so far (check out sub-pages in the Tasks grid) [here](https://www.notion.so/rive-app/Hydrogen-1175da0b06d9807ea221c1cd2fbd0175?pvs=4).

Working in the desktop and web editors:

Desktop
![CleanShot 2024-12-13 at 15 47 33@2x](https://github.com/user-attachments/assets/04c796a7-c358-48cc-8f3a-8e31439eafd9)

Web
![CleanShot 2024-12-13 at 15 47 59@2x](https://github.com/user-attachments/assets/fd67851a-ef76-4420-8459-a0bfeb8b94dd)

There's also a standalone test app in packages/sample_code_core:
![CleanShot 2024-12-13 at 15 48 54@2x](https://github.com/user-attachments/assets/7deedf87-3b54-4f80-876b-ac348a0d5b0d)

Diffs=
b9773680e3 Scripting begins! (#8751)

Co-authored-by: Luigi Rosso <luigi-rosso@users.noreply.github.com>

.rive_head

@@ -1 +1 @@
-7cc6f5bbe3c726fc1c94f2075aed7f262240282d
+b9773680e341b946fa06d046cfeeda8f97555645

include/rive/core/binary_writer.hpp

@@ -3,6 +3,7 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <string>
 
 namespace rive
 {
@@ -25,6 +26,7 @@ public:
     void writeDouble(double value);
     void write(uint16_t value);
     void write(uint32_t value);
+    void write(std::string value);
     void clear();
 };
 } // namespace rive

scripting/premake5.lua

@@ -0,0 +1,34 @@
+local dependency = require("dependency")
+luau = dependency.github("luigi-rosso/luau", "rive_0_2")
+
+require("export-compile-commands")
+dofile("rive_build_config.lua")
+
+project("luau_vm")
+do
+	kind("StaticLib")
+	exceptionhandling("On")
+
+	includedirs({
+		luau .. "/VM/include",
+		luau .. "/Common/include",
+	})
+
+	files({ luau .. "/VM/src/**.cpp" })
+	optimize("Size")
+end
+
+project("luau_compiler")
+do
+	kind("StaticLib")
+	exceptionhandling("On")
+
+	includedirs({
+		luau .. "/Compiler/include",
+		luau .. "/Ast/include",
+		luau .. "/Common/include",
+	})
+
+	files({ luau .. "/Compiler/src/**.cpp", luau .. "/Ast/src/**.cpp" })
+	optimize("Size")
+end

src/core/binary_writer.cpp

@@ -142,4 +142,11 @@ void BinaryWriter::write(uint32_t value)
     m_Stream->write((const uint8_t*)&value, 4);
 }
 
+void BinaryWriter::write(std::string value)
+{
+    auto length = value.size();
+    writeVarUint((uint64_t)length);
+    write((uint8_t*)value.c_str(), length);
+}
+
 void BinaryWriter::clear() { m_Stream->clear(); }