Fix the way tester works, move it into the tools directory and clean up
how it processes files including adding more data to the summary about
what failed and why.
Remove the dependencies on perl and make.
inline.pl is replaced by tools/gen-jscore and token/tokenfmt is replaced
by tools/gen-tokens which are both golang text/template utilities.
gen-jscore uses property ordering that matches chromes output ordering
adding missing properties to the Error types.
Local generated documentation have been removed as https://pkg.go.dev/
is more feature rich.
The use of make has been removed as the functionality is now replicated by
standard golang tools go test ./... and go generate ./... as well as integrated
into github actions.
