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/fab.fish

@@ -1,40 +0,0 @@
-function fab -d "Fuzzy find and execute a Fabric pattern"
-    set -l json_file ~/.config/fabric/pattern_explainations.json
-    
-    if not test -f $json_file
-        set_color red; echo "Error: $json_file not found."; set_color normal
-        return 1
-    end
-
-    # 1. Safely capture piped input (if any) to a temp file
-    # This preserves all formatting, newlines, and avoids variable escaping issues
-    set -l temp_input (mktemp)
-    if not isatty stdin
-        cat > $temp_input
-    end
-
-    # 2. Parse JSON to TSV -> fzf (Name in list, Description in preview) -> Extract Name
-    set -l selection (jq -r '.[] | "\(.name)\t\(.description)"' $json_file | \
-        fzf --delimiter '\t' \
-            --with-nth 1 \
-            --preview 'echo {2}' \
-            --preview-window 'right:60%:wrap' \
-            --prompt 'Pattern > ' \
-            --info inline \
-            --bind 'ctrl-/:toggle-preview')
-
-    # 3. Execute with or without the piped data
-    if test -n "$selection"
-        set -l pattern (string split -f 1 \t "$selection")
-        
-        # If our temp file has data (-s), pipe it. Otherwise, run bare.
-        if test -s $temp_input
-            cat $temp_input | fabric --pattern "$pattern"
-        else
-            fabric --pattern "$pattern"
-        end
-    end
-
-    # 4. Clean up
-    rm -f $temp_input
-end