* fix(mode): incompatible with vim.v.count
* ref(Vars): track local copy of global value
* ref(Mode): use new `Vars`
* ref(Mode): handle exit during `enter`
* ref: swap `Var.new` param order
Mode name should come before var name
* docs(examples): Vars
* ref: rename `Vars` -> `Var`
* fix(Mode): check if `exit == 1` for vim compat
* fix(Prompt): use new `Var` impl
* ref: remove `count1`
It seems like `math.max` is enough for this purpose
* doc: use h3 headers
