AOT: Project build mode (entry file + dependency graph)

[PurHur]

Problem

bin/compile.php compiles a single source file. Multi-file apps need manual concatenation or VM includes.

Goal

php bin/compile.php --project src/index.php -o webapp compiles entry + transitive include/require into one binary.

Tasks

• Static include graph analysis from entry (respect require_once)
• Single LLVM module or link multiple objects (lib/AOT/Linker.php)
• Emit debug map (file → line) for -y flag
• CI AOT test with 2-file fixture
• Document deploy: copy binary + static assets only

Depends on

• include/require in JIT/AOT (Language: Implement foreach (CFG → VM → JIT) #53)
• Runtime superglobals for per-request behavior

Acceptance criteria

Two-file example compiles to one executable producing correct output.