docs: Create AI-assisted compiler development paper structure

Added paper-g-ai-assisted-compiler folder documenting:
- Week-long LLVM backend development with AI assistance
- Key insights from PHI/SSA struggles to Resolver API solution
- Development log capturing the chaotic reality
- Abstract in both English and Japanese

Key quote: 'I don't remember anymore' - capturing the authentic
experience of intensive AI-assisted development where the process
itself becomes the research data.

This represents potentially the first fully documented case of
building a compiler backend primarily through AI assistance.

src/backend/llvm/compiler/codegen/mod.rs

@@ -277,7 +277,22 @@ impl LLVMCompiler {
                             defined_in_block.insert(*dst);
                         },
                         MirInstruction::Call { dst, func: callee, args, .. } => {
-                            instructions::lower_call(&codegen, &mut cursor, *bid, func, &mut vmap, dst, callee, args, &const_strs, &llvm_funcs)?;
+                        instructions::lower_call(
+                            &codegen,
+                            &mut cursor,
+                            &mut resolver,
+                            *bid,
+                            func,
+                            &mut vmap,
+                            dst,
+                            callee,
+                            args,
+                            &const_strs,
+                            &llvm_funcs,
+                            &bb_map,
+                            &preds,
+                            &block_end_values,
+                        )?;
                             if let Some(d) = dst { defined_in_block.insert(*d); }
                         }
                         MirInstruction::BoxCall {