v1.2.0

doc: protocol 2 ships in forsitan 2.13.1

The compatibility table said forsitan >= 2.6.15 for both client generations,
written while protocol 2 was still unreleased. Name the release it landed in,
and say that a v1.0-v1.1 client refuses a 2.13.1 server.

v1.1.0

v1.1.0 — runtime protocol version check in all clients, compatibility…

v1.0.0

v1.0.0 — Go limen-cli and limen-mcp, Python library, starter patch, C…