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_config/fish/functions/ghg.fish

@@ -1,18 +1,5 @@
-function ghg -a repo
-    # ghq natively understands https://, ssh://, git@host:…, and host/user/repo
-    ghq get $repo; or return
-
-    # Reduce the input to ghq's on-disk shape: <host>/<user>/<repo>
-    set -l rel (string replace -r '^\w+://' '' -- $repo)   # strip scheme  (https://, ssh://, git://)
-    set rel (string replace -r '^[^@/]+@' '' -- $rel)       # strip user@   (git@github.com:…)
-    set rel (string replace ':' '/' -- $rel)                # scp host:path → host/path
-    set rel (string replace -r '\.git$' '' -- $rel)         # strip trailing .git
-
-    # bare "user/repo" with no host → default to github.com
-    string match -q '*.*/*' -- $rel; or set rel github.com/$rel
-
-    set -l dir (ghq root)/$rel
+function ghg -a repo --description 'ghq get + cd (clone/path logic in ~/.local/bin/ghg-clone)'
+    set -l dir (ghg-clone $repo); or return
     cd $dir; or return
-    zoxide add $dir
     clear; and onefetch
 end