Less version 683

Version 683 was released for beta testing on 8 Sep 2025.

These are the differences between version 679 and version 683:

• Add --cmd option (github #624).
• Change --incsearch so that after typing each character of the pattern, the search begins at the position where the search command was invoked, not the current position (github #640).
• Don't output U+00AD and U+200D, and fix some bugs handling emoji modifier characters (github #637).
• Fix hang if a search using ^S modifier matches empty string (github #634).
• Fix bug using -g and -J (github #636).
• Fix bug when pasting a search pattern while --incsearch is active (github #635).
• Fix bug in Windows build when autorepeating a search pattern (github #639).
• Fix lesskey bug using #stop directive.
• Fix lesskey bug using "invalid" action (github #643).
• Fix bug causing file to appear to end prematurely if an input command was received during a file read (github #649).
• Fix performance issue in & filtering (github #638). Problem was introduced in da2a9ecdf16beb642d0c030e35f0351c5f2e5a12 and released in less-673.