DevEx: phpc serve --aot runs precompiled CGI binary per project

[PurHur]

Problem

Developers need to test AOT binaries without manual compile.php + CGI env wiring. #180 covers deploy bundles; this covers local dev ergonomics.

Goal

phpc build -o .phpc/bin/app examples/003-MiniWebApp/public/index.php
phpc serve --aot 127.0.0.1:8080 examples/003-MiniWebApp/public

Spawns CGI driver (#50) with per-request env against prebuilt binary.

Tasks

• phpc serve --aot flag in bin/phpc.php
• Detect binary from phpc.json (DevEx: phpc.json project manifest (entry, includes, public assets) #106) or -o path
• Proxy to Web: CGI/1.1 request driver (stdin/stdout, env, Status line) #50 CGI driver with docroot static files (Web: Serve static assets from docroot (CSS, JS, images) #150)
• Document vs VM/JIT serve modes

Acceptance criteria

Same curl tests pass against VM and AOT serve modes for 001-SimpleWeb after #201.

Dependencies

• Web: CGI/1.1 request driver (stdin/stdout, env, Status line) #50, DevEx: phpc.json project manifest (entry, includes, public assets) #106, AOT: Deploy bundle (binary + public assets + phpc.json manifest) #180, AOT: Per-request superglobal refresh in native binary (not compile-time bake) #201

Files

• bin/phpc.php, bin/serve.php, script wrapper