weechat: add script to run wee-slack in tmux

diff --git a/bin/wee-slack b/bin/wee-slack
new file mode 100755 (executable)
index 0000000..85a5ed3
--- /dev/null
+++ b/bin/wee-slack
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+tmux -u new-session -As wee-slack /usr/bin/weechat