fix(newos4): skill-create stops mangling what the agent wrote (v4.6.82)

Two defects in one parser, both silent:
- content = args.slice(2).join(' ') destroyed every newline, so markdown arrived as one line
- the last argument was treated as tags whenever it contained a comma, and stayed in the body:
  a multi-line skill became a single line with ~13 bogus tags, reported as success

Bodies can now be read from a VFS path (the only way markdown survives an argv splitter),
tags are opt-in via --tags=, category via --category=. skill-patch takes a path too.

Verified: body from file -> 6 newlines preserved, tags [alpha,beta], category testing;
inline body containing four commas -> tags [], body intact.

0 files changed, 0 insertions, 0 deletions