Rename the diffutils binary to diff,

[oSoMoN]

in preparation for the future implementation of other binaries (cmp, sdiff and diff3)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

Project coverage is 75.06%. Comparing base (d362046) to head (9a7d8c8).
Report is 31 commits behind head on main.

Files with missing lines	Patch %	Lines
tests/integration.rs	0.00%	0 Missing and 16 partials ⚠️

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HEAD has 4 uploads less than BASE

Flag	BASE (d362046)	HEAD (9a7d8c8)
ubuntu_latest	2	1
macos_latest	2	0
windows_latest	2	1

Additional details and impacted files

@@ Coverage Diff @@## main #75 +/- ##
==========================================
- Coverage 82.48% 75.06% -7.42% 
==========================================
Files 10 10 Lines 2935 2876 -59 Branches 744 744 ==========================================
- Hits 2421 2159 -262 
Misses 495 495 - Partials 19 222 +203 

Flag	Coverage Δ
macos_latest	?
ubuntu_latest	75.45% <0.00%> (ø)
windows_latest	15.41% <0.00%> (ø)

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[sylvestre]

what is your plan here? Create new binaries ?

What about doing the same as coreutils ? One main binaries (or individual programs)
and if you do ln -s diffutils diff or ln -s diffutils cmp, it will change the behavior of the command.

[oSoMoN]

I was thinking of individual binaries, but I must admit I didn't look at how it's done for coreutils, and I suppose it makes sense to do something similar. I'll take a look later, in the meantime I'm leaving this PR open.

[sylvestre]

the main adv is the size of the binaries as Rust bins have a tendency to be bigger than C :)

[oSoMoN]

Closing, as this is definitely being obsoleted by Gustavo's work in #88.