Add basic support for ANSI escape sequences

[simonis]

This feature is currently enabled by default on Linux but can be switched on with -DisAnsiTTY=true on any platform that supports ANSI escape sequences.
If ANSI escapes are enabled, there will be no more scrolling at each new report output.

Also eliminated trailing whitespaec and tabs.

[egahlin]

Nice idea, but how does this work if you want to log something at the same time? Perhaps it is better to make it into an option, i.e.

$ java -javaagent:health-report.jar:scroll=false

private final static void start(String args) {
var options = parseAgentOptions(args);
scroll = Boolean.valueOf(options.getOrDefault("scroll", "true");
...

There is already support for parsing agent options in the file.

[simonis]

Sure, I can do that. Do you want it on or off by default?

[egahlin]

I like it to scroll by default.