ENH: Fast TDL TDC

[MarcoVogt]

TDC implementation with sub-ns resolution based on tapped delay lines (TDL).

[cbespin]

@MarcoVogt I took some of these commits and made them their own PR, especially since #230 already existed. Maybe rebase (or merge) before you continue coding to prevent ugly merge conflicts later

[cbespin]

Thanks! I will give this a review as soon as possible! There are currently no tests covering any of the tdl_tdc, right?

[codecov]

Codecov Report

Attention: Patch coverage is 1.12360% with 88 lines in your changes missing coverage. Please review.

Project coverage is 13.98%. Comparing base (4480251) to head (0803dfc).
Report is 34 commits behind head on master.

Files with missing lines	Patch %	Lines
basil/HL/tdl_tdc.py	0.00%	88 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (4480251) and HEAD (0803dfc). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (4480251)	HEAD (0803dfc)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #231       +/-   ##
===========================================
- Coverage   31.48%   13.98%   -17.51%     
===========================================
  Files          87       88        +1     
  Lines        6026     6123       +97     
===========================================
- Hits         1897      856     -1041     
- Misses       4129     5267     +1138     

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