shell: fish functions -> ~/.local/bin executables + bash/zsh ports; manage ~/.agents

- 16 cross-shell utilities converted to sh/bash chezmoi executables:
  ai c2p cp-appid extract_agents fab gdc gh-sonr-org-migrate ghg-clone
  ghn gho git-summary launch_omp_livediff_overlay lc-elir mdcp mdp pj
  (ghg-clone not named ghg: unrelated cargo binary owns that name)
- cwd/history helpers stay per-shell: yy c cd clip-last + ghg/ghn/gho
  cd-wrappers in bash/functions/ and zsh/functions/, loaded by rc files
- fish keeps only shell-state functions; converted ones now hit PATH
- cp-appid ignore gating moved to .local/bin path
- dot_agents/skills: 82 skills materialized from dotstate storage so
  dot_claude skill symlinks resolve on fresh bootstrap; dotstate
  profile/symlinks.json released .agents/skills .bashrc .zshrc

dot_local/bin/executable_ghg-clone

@@ -0,0 +1,34 @@
+#!/bin/sh
+# ghq get + resolve the on-disk clone path; prints the repo directory.
+# Shell wrappers (fish/bash/zsh `ghg` functions) cd into the printed path —
+# a child process can't change the caller's cwd.
+repo=$1
+if [ -z "$repo" ]; then
+    echo "usage: ghg-clone <repo>" >&2
+    exit 1
+fi
+
+# ghq natively understands https://, ssh://, git@host:…, and host/user/repo.
+# Keep its output on stderr so stdout stays clean for the wrapper's cd.
+ghq get "$repo" >&2 || exit
+
+# Reduce the input to ghq's on-disk shape: <host>/<user>/<repo> —
+# strip scheme (https://, ssh://, git://), user@ (git@github.com:…),
+# turn scp host:path into host/path, drop trailing .git.
+rel=$(printf '%s\n' "$repo" \
+    | sed -E 's#^[[:alnum:]]+://##; s#^[^@/]+@##; s#:#/#; s#\.git$##')
+
+# bare "user/repo" with no host → default to github.com
+case "$rel" in
+    *.*/*) ;;
+    *) rel=github.com/$rel ;;
+esac
+
+dir=$(ghq root)/$rel
+if [ ! -d "$dir" ]; then
+    echo "ghg: expected clone at $dir but it does not exist" >&2
+    exit 1
+fi
+
+command -v zoxide >/dev/null 2>&1 && zoxide add "$dir"
+printf '%s\n' "$dir"