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)
q (quick append)
s (ranlib)
t (display)
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.