Remove internal Profiler in favour of Tracy

[thorstenhater]

I decided to remove the internal profiler since it had some hard to fix flaws:

• It require conditional compilation (or querying .conf() in Python) in examples to print the results
• It doesn't compose well since nesting is not allowed
• It needs extra code to cope with mechanism.hpp
• Need to pair PE/PL

Tracy on the other hand gives us

• out of band data collection
• native visualization
• nested zones
• RAII safety when marking zones
• some niceties wrt threads
• the ability to mark which mechanism we're updating

all in 3 macros.

I have some plans to add memory tracking later on, but I am reluctant to overload new and that
seems to be the only way of getting into std::vector and friends.

Here's the moment when we add spikes:

Some clean-up was done as well, mainly swapping std::shared_ptr{new T(...)} for std::make_shared<T>(...)
and same for unique_ptr.