Add .claudeignore and bytecode architecture documentation

This commit introduces two new files:
- `.claudeignore`: Specifies files and directories that should be
  ignored by Claude, such as snapshot files and the `target` directory.
- `docs/bytecode-architecture.md`: Documents the architecture for
  bytecode generation, outlining the hybrid execution model, the
  transformation pipeline (Specializer and Lowering), and the role of
  Tail Call Optimization (TCO).

.claudeignore

@@ -0,0 +1,4 @@
+*.snap
+*.snap.new
+target/
+docs/delphi/