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_agents/skills/linear-documents/SKILL.md

@@ -0,0 +1,33 @@
+---
+name: linear-documents
+description: Manage Linear documents. Use for creating and viewing documentation.
+allowed-tools: Bash
+---
+
+# Documents
+
+```bash
+# List documents
+linear-cli d list
+linear-cli d list --output json
+
+# Get document
+linear-cli d get DOC_ID
+linear-cli d get DOC_ID --output json
+
+# Create document
+linear-cli d create "Design Doc" -p PROJECT_ID
+linear-cli d create "RFC" -p PROJECT_ID --id-only
+
+# Update document
+linear-cli d update DOC_ID --title "New Title"
+linear-cli d update DOC_ID --content "New content"
+```
+
+## Flags
+
+| Flag | Purpose |
+|------|---------|
+| `-p PROJECT` | Project ID |
+| `--id-only` | Return ID only |
+| `--output json` | JSON output |