Documentation and example cli tool merging

[hamishcoleman]

• man page
• readme
• migrate uncommon options away from cli
• convert n3n-keygen into a subcmd
• switch tests_hashing into a subcmd
• add tests for the new subcmds
• packet patch refactoring
• config option name and boolean state cleanups

[codecov-commenter]

Codecov Report

Attention: 125 lines in your changes are missing coverage. Please review.

Comparison is base (1c3b2eb) 43.21% compared to head (24be336) 38.81%.

Files	Patch %	Lines
src/edge_utils.c	10.30%	87 Missing :warning:
src/test_hashing.c	68.65%	21 Missing :warning:
apps/edge.c	71.05%	11 Missing :warning:
src/edge_management.c	60.00%	4 Missing :warning:
apps/supernode.c	0.00%	1 Missing :warning:
src/conffile.c	0.00%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #10 +/- ## ========================================== - Coverage 43.21% 38.81% -4.40% ========================================== Files 37 50 +13 Lines 5707 8639 +2932 ========================================== + Hits 2466 3353 +887 - Misses 3241 5286 +2045 ```

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