Modernize cmake and update debug options

[emlowe]

Use add_compile_options and add_link_options to modernize and simplify cmake rules

Also use -0g for debug mode compiling per Arvid recommendations as this allows for optimizations that don't impact debugging

[coveralls-official]

Pull Request Test Coverage Report for Build 13167823220

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 54 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.7%) to 79.701%

---

Files with Coverage Reduction	New Missed Lines	%
src/encoding.hpp	1	94.83%
lib/include/picosha2.hpp	1	93.5%
src/util.hpp	2	92.48%
src/disk.hpp	2	83.85%
src/b17sort_manager.hpp	3	0.0%
src/phase1.hpp	3	94.15%
src/b17phase4.hpp	3	0.0%
src/prover_disk.hpp	5	87.08%
src/plotter_disk.hpp	7	71.17%
src/b17phase3.hpp	12	0.0%

Totals
Change from base Build 13081686849:	0.7%
Covered Lines:	3573
Relevant Lines:	4483

---

💛 - Coveralls

[hoffmang9]

lgtm

[AmineKhaldi]

Looks good. Sent some suggestions.

[AmineKhaldi]

Sorry for not seeing these suggestions earlier (the nesting).

[hoffmang9]

lebtm