feat(skills/airtable): tailor skill to Hermes idioms + expand cookbook

Expand the airtable skill from bare CRUD to a full Hermes-shaped
cookbook matching the linear/notion neighbors, and trim the
description to fit the 60-char system-prompt cutoff.

Hermes-specific additions:
- Explicit 'use the terminal tool with curl — not web_extract or
  browser_navigate' guidance, matching the same note in linear.
- Note that AIRTABLE_API_KEY flows from ~/.hermes/.env into the
  subprocess automatically via env_passthrough, so curl calls don't
  need to re-export it.
- Prefer 'python3 -m json.tool' (always present) over jq (optional)
  for pretty-printing, with -s on every curl to keep output clean.
- Read-before-write workflow that resolves record IDs via
  filterByFormula instead of guessing.

Cookbook expansion (new vs original):
- Field-type reference table (text, select, multi-select, attachment,
  linked record, user) with the exact write-shape Airtable expects.
- typecast flag for auto-coercing values / auto-creating select options.
- performUpsert PATCH for idempotent sync by merge field.
- Batch create/delete endpoints (10-record cap per call).
- Sort + fields query params with URL-encoding (%5B / %5D).
- Named-view query that applies saved filter/sort server-side.
- Full pagination loop template (while loop with offset).
- Common filterByFormula patterns (exact match, contains, AND/OR,
  date comparison, NOT empty).
- Rate-limit backoff guidance (Retry-After header, per-base budget).
- Airtable error-code reference (AUTHENTICATION_REQUIRED,
  INVALID_PERMISSIONS, MODEL_ID_NOT_FOUND,
  INVALID_MULTIPLE_CHOICE_OPTIONS) so the agent can map failures to
  user-actionable fixes instead of just retrying.

Also: description trimmed from 183 chars (truncated to 60 in system
prompt, losing 'filter/upsert/delete' trigger terms) down to 59 chars
that render whole: 'Airtable REST API via curl. Records CRUD, filters,
upserts.' Catalog row updated to match.

SKILL.md grew from 115 to 228 lines — still under the 500-line soft
cap and below the linear skill (297 lines) which serves the same
role for GraphQL.

website/docs/reference/skills-catalog.md

@@ -132,7 +132,7 @@ If a skill is missing from this list but present in the repo, the catalog is reg
 
 | Skill | Description | Path |
 |-------|-------------|------|
-| [`airtable`](/docs/user-guide/skills/bundled/productivity/productivity-airtable) | Read/write Airtable bases via REST API using curl. List bases, tables, and records; create, update, and delete records. No dependencies beyond curl. | `productivity/airtable` |
+| [`airtable`](/docs/user-guide/skills/bundled/productivity/productivity-airtable) | Airtable REST API via curl. Records CRUD, filters, upserts. | `productivity/airtable` |
 | [`google-workspace`](/docs/user-guide/skills/bundled/productivity/productivity-google-workspace) | Gmail, Calendar, Drive, Contacts, Sheets, and Docs integration for Hermes. Uses Hermes-managed OAuth2 setup, prefers the Google Workspace CLI (`gws`) when available for broader API coverage, and falls back to the Python client libraries... | `productivity/google-workspace` |
 | [`linear`](/docs/user-guide/skills/bundled/productivity/productivity-linear) | Manage Linear issues, projects, and teams via the GraphQL API. Create, update, search, and organize issues. Uses API key auth (no OAuth needed). All operations via curl — no dependencies. | `productivity/linear` |
 | [`maps`](/docs/user-guide/skills/bundled/productivity/productivity-maps) | Location intelligence — geocode a place, reverse-geocode coordinates, find nearby places (46 POI categories), driving/walking/cycling distance + time, turn-by-turn directions, timezone lookup, bounding box + area for a named place, and P... | `productivity/maps` |