Replace clipboard with copypasta

[nibon7]

This PR tries to replace clipboard with copypasta. clipboard is unmaintained and xcb that clipboard depends on has a rustsec advisory.

Crate:     xcb
Version:   0.8.2
Title:     Multiple soundness issues
Date:      2021-02-04
ID:        RUSTSEC-2021-0019
URL:       https://rustsec.org/advisories/RUSTSEC-2021-0019
Solution:  Upgrade to >=1.0
Dependency tree:
xcb 0.8.2
└── x11-clipboard 0.3.3
    └── clipboard 0.5.0
        └── reedline 0.21.0

Crate:     clipboard
Version:   0.5.0
Warning:   unmaintained
Title:     clipboard is Unmaintained
Date:      2022-06-25
ID:        RUSTSEC-2022-0056
URL:       https://rustsec.org/advisories/RUSTSEC-2022-0056
Dependency tree:
clipboard 0.5.0
└── reedline 0.21.0

Crate:     xcb
Version:   0.8.2
Warning:   unsound
Title:     Soundness issue with base::Error
Date:      2020-12-10
ID:        RUSTSEC-2020-0097
URL:       https://rustsec.org/advisories/RUSTSEC-2020-0097
Severity:  5.5 (medium)

[amtoine]

this looks like a super simple change!
if that's a more maintained library that does basically the same thing with the same API and that others are ok with it, then i'm ok with it 😌

[sholderbach]

Mhh what gives me pause is that this adds a ton of dependencies (I understand that there may be additional work to support wayland as well but that list seems a bit excessive)

From a pure nushell perspective we could simply drop the system clipboard support in reedline as we don't actually use it or enable the feature. Not sure if the community at large depends on it.

[nibon7]

Most of the dependencies are pulled by wayland feature.

crate	features	# dependencies
clipboard	N/A	135
copypasta	x11	141
copypasta	x11+wayland	159

[fdncred]

We're close to landing #689 so we're going to need some type of replacement so nushell's CI will go green. Also mentioned here nushell/nushell#11535. There's also a failing test with the system_clipboard feature that I noticed the other day.

Maybe @Tastaturtaste and/or @nibon7 can figure out which is the best clipboard replacement for our needs?