~aleteoryx/tclircc

this component is just gonna be routing management actually
rpcbind who
more ui work
basic ui things
interceptors working
add support for message intercepting, bugfix in irc::extern remove
CAP ACK/NAK, initial negotiation
capability requesting
fill out handler types

add multithreading, make removals smarter, change semantics here and there
log documentation
irc::src typo fix
log documentation
better meta management
meta management
cleanup pass
listeners functional, irc.tcl mostly feature-complete
protocol done, but for 2 listener types and some polish
amend README
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