Support all operations for all platforms

[moosichu]

We should only tick a given entry in the table below if both the feature has been implemented for the corresponding archive type and we have tests for it that are checked-in and run as part of our CI.

operation	gnu	gnu64	bsd	darwin64
r (insert)	- [ ]	- [ ]	- [ ]	- [ ]
d (delete)	- [ ]	- [ ]	- [ ]	- [ ]
m (move)	- [ ]	- [ ]	- [ ]	- [ ]
p (print)	- [x]	- [ ]	- [x]	- [ ]
q (quick append)	- [ ]	- [ ]	- [ ]	- [ ]
s (ranlib)	- [ ]	- [ ]	- [ ]	- [ ]
t (display)	- [x]	- [ ]	- [x]	- [ ]
x (extract)	- [ ]	- [ ]	- [ ]	- [ ]

[iddev5]

r, d and x are already implemented for gnu, bsd

[moosichu]

We need tests before they can be checked off - I think that's important.

[iddev5]

Working on it, by the way

[moosichu]

Currently working on parsing BSD symbols in archives (including sorted & 64 bit) as found on macOS.