Reference: MiniWebApp lint-first skeleton (examples/003-MiniWebApp)

[PurHur]

Problem

#67 and #210 describe the target app, but there is no tree under examples/ that drives phpc lint / ExamplesCompileTest toward the full feature set. Contributors cannot see which language/stdlib issues block the reference app until someone writes the whole app.

Goal

Add examples/003-MiniWebApp/ as a lint-first skeleton: real file layout, intentional unsupported constructs documented via phpc lint --json, README listing blockers with issue links.

Proposed layout

examples/003-MiniWebApp/
  README.md           # curl recipes + blocker table (#192, #53, #54, …)
  public/index.php    # front controller (switch/foreach/includes)
  src/Router.php
  templates/home.php
  config.php

Scope

• Scaffold files matching Web: MiniWebApp routing pattern (front controller + path dispatch) #210 route table (can use ?route= until PATH_INFO routing is ready)
• phpc lint public/index.php exits non-zero with mapped issues until blockers close
• README: VM / JIT / AOT run instructions (expect failure until Reference app: examples/003-MiniWebApp (router, templates, forms) #67 unblocked)
• Optional: add to ExamplesCompileTest as @group miniwebapp skipped until green
• Do not weaken syntax to hide gaps — keep loops, ??, includes in source

Acceptance criteria

./phpc lint examples/003-MiniWebApp/public/index.php

prints line-accurate unsupported nodes with #192, #53, #99, etc.; README blocker table matches lint output.

Verification (local)

./script/ci-local.sh --filter LintTest

Dependencies

• Web: MiniWebApp routing pattern (front controller + path dispatch) #210 routing spec
• Reference app: examples/003-MiniWebApp (router, templates, forms) #67 full reference app (this issue unblocks planning, not completion)
• DevEx: phpc lint reports unsupported Stmt/Expr before LogicException #236 lint CLI (closed)

Non-goals

• Making the app run on VM before language issues close
• GitHub Actions workflow changes