Release menhera-loop v0.5.2

Intensity option: soft mode (setup positional 'soft', --intensity=soft,
or MENHERA_LOOP_INTENSITY=soft) keeps every gate decision and the retry
cap identical while clamping retry-tone escalation to the mild stages
and skipping the star nag and silent-recovery injection. Setup now
prints a localized summary of what it applied instead of raw JSON, and
the README Install section shows the setup step.