removing spirv headers dependencies, reworking architecture

src/Runtime.zig

@@ -0,0 +1,41 @@
+const std = @import("std");
+const spv = @import("spv.zig");
+
+const SpvVoid = spv.SpvVoid;
+const SpvByte = spv.SpvByte;
+const SpvWord = spv.SpvWord;
+const SpvBool = spv.SpvBool;
+
+const Module = @import("Module.zig");
+const WordIterator = @import("WordIterator.zig");
+
+const Self = @This();
+
+pub const CallError = error{
+    Unreachable,
+    Killed,
+    Error,
+    InitEnd,
+    ExecEnd,
+};
+
+module: *Module,
+it: WordIterator,
+stack_frames: std.SinglyLinkedList,
+
+pub fn init(module: *Module) !Self {
+    return .{
+        .module = module,
+        .it = module.it,
+        .stack_frames = .{},
+    };
+}
+
+pub fn deinit(self: *const Self) void {
+    _ = self;
+}
+
+pub fn callEntryPoint(self: *Self, entry: SpvWord) CallError!void {
+    _ = self;
+    _ = entry;
+}