ENH: Potential redesign, take three

[HaoZeke]

I was disappointed that the previous design didn't yield any benefits in terms of performance. Also adding to the parameters in and out of the force call was a nightmare. This fixes both, and also:

• Closes #45.
• [X] Implements the CRTP style overloads instead of tags (similar to Job)
• [x] A new counter mechanism
• [X] Introduces a new set of two C structs for the force call (documentation why is also present)
• [X] Fixes a CuH2 bug (all zeros due to conflicting symbols) by a complete rewrite

[HaoZeke]

As of f7bf437

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
eonclient -s client/example/pos.con -p lj	7.6 ± 1.7	4.5	11.9	1.00
eonSVNonly/client/eonclient -s client/example/pos.con -p lj	9.9 ± 2.2	5.8	15.3	1.30 ± 0.41

[HaoZeke]

We now have a clean valgrind check:

==586828== Memcheck, a memory error detector
==586828== Copyright (C) 2002-2024, and GNU GPL'd, by Julian Seward et al.
==586828== Using Valgrind-3.23.0 and LibVEX; rerun with -h for copyright info
==586828== Command: eonclient -s client/example/pos.con -p lj
==586828== Parent PID: 4149992
==586828== 
==586828== 
==586828== HEAP SUMMARY:
==586828==     in use at exit: 0 bytes in 0 blocks
==586828==   total heap usage: 4,085 allocs, 4,085 frees, 272,727 bytes allocated
==586828== 
==586828== All heap blocks were freed -- no leaks are possible
==586828== 
==586828== For lists of detected and suppressed errors, rerun with: -s
==586828== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)