pi: compact tool output, pinned, 3-line previews for every tool

pi-compact-tools draws each tool call as a short, expandable row; Ctrl+O shows
the whole result. Every built-in and every custom tool, MCP ones included, is
compacted and starts as a 3-line preview -- previewLines only applies to rows
that do not start hidden, so nothing does.

Pinned to the v0.14.0 commit, byte-identical to the npm tarball: the package
had 32 releases in its first three weeks, and unpinned that would be new code
across the fleet nearly every day.

The config is linked rather than generated so it is the same everywhere, and
/compact-tools saves through the link by design. AGENTS.md now says which
linked files their tools rewrite, and that such a change is not an agent's to
commit or revert.

From change request 4d685a.

0 files changed, 0 insertions, 0 deletions