fix issue in plugincontroller when loading plugins without info

fix listing of plugin components

Plugins may have one main component of a type or they might have
multiple of the same type in a subdirectory.

Sometimes they may have both. This is often the case f

fix listing of plugin components

Plugins may have one main component of a type or they might have
multiple of the same type in a subdirectory.

Sometimes they may have both. This is often the case for organically
grown plugin, commonly with helper classes where a helper.php exists
first only to be extended by helper/*.php files later.

This patch fixes the listing of plugin(components) by type in the plugin
controller.

It also adjusts bin/plugin.php to handle plugin CLI components.

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Automatically register composer autoloaders for plugins

The plugin controller will now automatically require vendor/autoload.php
for every plugin that has it.

Conform to new coding style

Fix long line

Logic fix

Use str_starts_with/str_ends_with

coding style: control flow whitespaces

coding style: function call spacing

coding style: PSR12.Classes.ClassInstantiation.MissingParentheses

address issues mention in PR#4045

apply PSR-12 constant visibility rule

PSR-12 says constants need their visibility declared from PHP 7.1
onwards

fix overlong line introduced by rector

Apply rector fixes to inc/Extension and inc/Debug

Update core code to make use of sexplode()

This makes use of our own explode mechanism everywhere were we expect a
fixed number of results.

Fix Undefined array key "fperm" warning

Also removed a few, now unnecessary `!empty` checks

Fixes #3382

reflow overlong line

better exception handling on plugin loading

Now all important places where plugins are loaded are guarded by a
try/except. We're catching Throwables here to be able to catch stuff
like syntax errors

better exception handling on plugin loading

Now all important places where plugins are loaded are guarded by a
try/except. We're catching Throwables here to be able to catch stuff
like syntax errors early on (otherwise they will only be caught by our
ErrorConverter much too late). This means that this change requires PHP
7.0 minimum!

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introduce a global error handler

This transfers old style PHP errors into Exceptions and installs a
global exception handler. All exceptions caught by this handler are
logged to an error log and a m

introduce a global error handler

This transfers old style PHP errors into Exceptions and installs a
global exception handler. All exceptions caught by this handler are
logged to an error log and a meassage is shown to the end user. This
should finally get rid of "blank page" bug reports.

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Minor optimizations in PluginController

Snake to Camel case fixes inn PluginController

Move list of plugin types to plugin controller constant

There is no need to have them in a global variable.

isEnabled instead of isDisabled

Boolean Methods with a negative name are a bit confusing. Getting false
for an enabled plugin? Better check for Enabled status.

removed get_directory() method from PluginController

This method did absolutely nothing and just returned the plugin name.

moved plugin controller to Extension namespace