Correct v7 file structure page

[arhimede]

Audit finding C9, verified against dotkernel/api branch 7.0 at 45ad282.

Twig claims removed

There are zero Twig references in the codebase. Rendering is Api\App\Template\Renderer with 'extension' => 'phtml' set in templates.global.php, and all five shipped templates under src/User/templates/user/ are .phtml.

Removed: "twig is used as Templating Engine", "All template files have the extension .html.twig", "templates.global.php - dotkernel/dot-twigrenderer config file" (not a dependency) and "cache - Cache for e.g. Twig files". core-features/rendering-and-sending-emails.md already documented this correctly, so the two pages no longer contradict each other.

Documented but nonexistent

Path	Reality
config/migrations.php	migration config lives in Core\App\ConfigProvider, read via config/cli-config.php
data/doctrine	migrations in src/Core/src/App/src/Migration, fixtures in src/Core/src/App/src/Fixture
config/autoload/doctrine.global.php	Doctrine config comes from the module ConfigProviders plus the local config template
config/autoload/mezzio-tooling-factories.global.php	not shipped
public/robots.txt.dist	the shipped file is a live public/robots.txt

.laminas-ci was described as a folder; the repository has a .laminas-ci.json file.

The mail config entry stays: it is absent from the repository tree but the post-install script copies it out of dotkernel/dot-mail, so it is present after installation. The entry now says so.

Real but undocumented, now added

config/routes.php, config/autoload/problem-details.global.php, bin/generate-oauth2-keys.php, bin/composer-post-install-script.php, public/.well-known/ (holds security.txt), public/favicon.ico, and the root documentation/ folder.

Also noted that Core is split under src/Core/src into Admin, App, Security, Setting and User, and that User is the only shipped module with a templates folder.

FAQ

Dropped the "Why is robots.txt shipped as robots.txt.dist?" entry, which documented a file that is not shipped. Added entries on why config/routes.php is empty, where migrations and fixtures live, and which templating engine is used.

markdownlint clean, one sentence per line.