Embed flameshow into the chdig binary

[azat]

Using PyOxidizer this can be mostly done, but there is some trickery since Starlack in PyOxidizer language does not support building libraries.

Prerequisites

• Static binary for flameshow wrapper #7

But also there are some things that should be checked first:

Stability

• does embedded python is stable enough
  • no memory leaks
  • no crashes

[azat]

Another downside is that I cannot strip flameshow only easily