rainbow-dark.theme:
- Message body text now tinted dim grey (%w) instead of inheriting
terminal-default (usually stark white) — done via a trailing %w in
the msgnick template.
- Own nick in public, private, and DCC contexts switches from bold
white (%W) to bold bright magenta (%M) so 'you' stays distinct but
stops looking like every other bright-white element.
- Action bodies (public, private, DCC) get the same %w dim-grey tint.
.irssi/config: add W1..W99 aliases so /w1, /w2, ... /w99 jump
directly to that window (pair to the existing bare numeric /1 /2
aliases, for users whose muscle memory has 'w' in it).
