Put every plugin class into its own FOG\Plugins\<Plugin> namespace

[mastacontrola]

Companion to FOGProject/fogproject#1535, which teaches core to resolve a namespaced plugin class. That PR must merge, release and be pinned first — a plugin declaring FOG\Plugins\… does not resolve on a core without its autoload arm.

What this does

All 176 class-declaring files across 15 plugins now declare:

namespace FOG\Plugins\<Ucfirst-plugin-directory-name>;

ldap/ → FOG\Plugins\Ldap, helloworld/ → FOG\Plugins\Helloworld. Mechanical ucfirst() of the directory name — no lookup table, no exceptions. The subdirectory (class/, pages/, hooks/, events/, reports/, tasks/, capone's reg-task/) is not part of it: every class in a plugin shares one flat namespace, because FOGController::getManager() is qualify(shortName($this) . 'Manager') and a model and its manager have to resolve together.

File layout is untouched — the discovery suffixes are how a page, hook, event, report or task is found.

Why the diff is one line per file

• All 403 core references were already leading-backslash FQCNs (\FOG\Base\FOGController), pinned by tests/core-references-are-qualified.test.php. A leading backslash means the same thing inside a namespace, so not one of them changed.
• Every catch was already qualified — 24 \Exception, one \TypeError, one \Throwable.
• self::getClass('X') string literals are untouched (~150 of them). Core's FOGBase::qualify() resolves a plugin short name to its new FQCN, so they keep working as written.
• A per-file sweep for bare PHP built-ins and cross-plugin bare references found nothing to fix.
• No class_alias() is added anywhere — that is the point of the core change.

Also in here

• helloworld/class/helloworld.class.php had a stale docblock claiming the class is found by PHP's default spl_autoload lowercasing the filename. That fallback was removed from core (ADR 0013 §2b) because it let a plugin shadow a core class. It now describes Initiator::autoload() and the new namespace.
• tests/oidc-flow-safety.test.php and tests/oidc-provider-safety.test.php require OIDC plugin source directly and called OIDC/OIDCManager/OIDCGroupManager/OIDCUserGrantManager bare. Both now qualify those references — without it, two tests went from green to a fatal Class "OIDC" not found.

Gate

tests/plugins-are-namespaced.test.php (new) asserts, for every class file under every plugin directory: exactly one namespace declaration; that it equals FOG\Plugins\ + the plugin directory, case-insensitively (PHP namespaces are, and a third-party plugin may spell it MyPlugin for directory myplugin); and that the file declares no class_alias(). It runs with no fogproject checkout, like its sibling.

Mutation-verified, both arms observed red:

- ldap/class/ldapmanager.class.php: declares no namespace (expected fog\plugins\ldap)
- ldap/class/ldapmanager.class.php: declares namespace 'FOG\Plugins\Oidc', expected 'fog\plugins\ldap' (case-insensitive)

Restored by copy, not git checkout --, and verified byte-identical.

Verification

• All 176 touched files plus the three test files pass php -l.
• Full suite 14/14.
• Loaded against the modified core with this tree as an external plugin root: all 176 classes resolve under their FQCN, 176 unique short names, and every bare name qualifies to its own FQCN.

Still outstanding, and it needs a running server: render every plugin page, install/uninstall a plugin, hit a plugin REST route, run a plugin task through PluginRunner.