all: Add serde aliases to make serialized tokens less verbose

[pentamassiv]

The DSL was replaced by using serde to serialize and deserialize tokens. The serialized strings are more verbose. I've added serde aliases so that users don't have to type much more than before. This shortens the serialized string from the serde example from:

[Text("Hello World! ❤\u{fe0f}"),MoveMouse(10,10,Rel),Scroll(5,Vertical),Button(Left,Click),Key(Unicode('🔥'),Click),Key(Control,Press),Key(Unicode('a'),Click),Key(Control,Release)]

to:

[t("Hello World! ❤\u{fe0f}"),m(10,10,r),s(5,v),b(l,c),k(uni('🔥'),c),k(ctrl,p),k(uni('a'),c),k(ctrl,r)]