Register tools without #[AsTool] attribute

[Iyadhfaleh]

The idea is to add tools that haven't #[AsTool] attribute like this :

new ToolBox(new ToolAnalyzer(), ['clock' => $clock]);

Tools MUST implement __invoke method.

[OskarStark]

Such a tool should be added to the tests/ folder, as we don't need to ship two clock tools, doing the exact same thing

[Iyadhfaleh]

I removed this added example . I already added a fixture test without the attribute .
The idea was to provide an example of tool without "AsTool" .
I deleted this attribute from clock tool to show that case .

[OskarStark]

I think we don't need an example for this, but rather a test, so please keep the clock with the attribute and the example and extend ToolboxTestCase with a fixture file, shown, that this tool will be registered. thanks

[chr-hertel]

Thank you @Iyadhfaleh for your idea to solve this - i'm currently not fully convinced since this is really limited - no description and only __invoke. with third party code this is not simply possible.
don't have a better idea myself atm as well.

[chr-hertel]

Replaced by #256, see #262 for docs.