* Don't specify wayclip mimetype
Problem: Since wayclip 0.2, wayclip assumes UTF-8
(text/plain;charset=utf-8) in absence of an explicit mimetype.
Since Neovim sets the mimetype to "text/plain" without
specifying UTF-8, you will also have to use `-t text/plain`
when using waypaste or wayclip outside of Neovim.
Solution: Don't specify mimetype when using wayclip, thereby using the
default "text/plain:charset=utf-8".
* Add primary clipboard support to wayclip
wayclip have had support for primary clipboard for some time now.
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Co-authored-by: Fredrik Foss-Indrehus <fred@ffoss.net>