feat(endo): Add command line

[kriskowal]

This change provides a preliminary command line for endo, mostly because it is convenient for ad-hoc testing, though it will likely grow into something else.

Usage:

# write an archive
$ endo archive mod.agar path/to/module.js

# produce a compartment map
$ endo compartmap path/to/module.js

This is entirely open for discussion.

[kriskowal]

@michaelfig recommended reserving -w for “watch” and @dtribble (I think) recommended parity with tar, so -c instead.

[warner]

Looks good, I could probably bikeshed on the subcommand names for a while, so I say just land it now and we'll figure out the details later.

[warner]

does.. this work? Is there some weird pseudo-symlink data format going on here that Node.js recognizes in a bin: property? I would have expected package.json to point at endo.js.

[kriskowal]

I’ll point this to endo.js since you’re right that it’s more likely to work depending on what tool you use to install CLI’s. But, Node.js does pierce symlinks such that relative imports are always relative to the canonical location.