Add country-agnostic linkedin-search skill (#20)

A general-purpose, field-agnostic job-search skill built on LinkedIn's public
jobs-guest endpoints. Works for any market out of the box — location is an
explicit required flag (no country default). Zero runtime dependencies (bun only);
search + detail commands.

Includes a personal-use / Terms-of-Service note (automated access is against
LinkedIn's ToS — keep volume low, non-commercial).

(Pairs with the .gitignore fix in #21, which lets skills under .agents/ be tracked.)

Co-authored-by: Akhil Tripathi <kodabear@Akhils-MacBook-Pro.local>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

.agents/skills/linkedin-search/url-reference.md

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+# LinkedIn Jobs URL Reference
+
+Public, unauthenticated `jobs-guest` endpoints used by this skill. Global — the same
+endpoints serve every market; only the `location` value changes.
+
+> Personal use only — automated access is against LinkedIn's Terms of Service; keep volume low.
+
+## Search
+
+```
+GET https://www.linkedin.com/jobs-guest/jobs/api/seeMoreJobPostings/search
+```
+
+Query params:
+
+| Param | Meaning | Example |
+|-------|---------|---------|
+| `keywords` | Free-text query | `data engineer` |
+| `location` | Place string | `Mumbai, Maharashtra, India` · `Berlin, Germany` · `Remote` |
+| `f_TPR` | Posted-within window (seconds) | `r604800` (7d), `r2592000` (30d) |
+| `f_WT` | Workplace type | `1` on-site · `2` remote · `3` hybrid |
+| `start` | Pagination offset (10/page) | `0`, `10`, `20`, … |
+
+Returns an HTML list of job cards (one `<li>` per posting). The CLI parses each card by
+its `data-entity-urn="urn:li:jobPosting:<id>"` and extracts title, company, location, date, URL.
+
+## Detail
+
+```
+GET https://www.linkedin.com/jobs-guest/jobs/api/jobPosting/<jobId>
+```
+
+Returns a single job's HTML: title (`top-card-layout__title`), company
+(`topcard__org-name-link`), location (`topcard__flavor--bullet`), the rich description
+(`show-more-less-html__markup` / `description__text`), and job-criteria items
+(seniority, employment type, job function, industries).
+
+## Notes
+
+- No authentication required.
+- Respect rate limits — the CLI backs off on 429/5xx.
+- Country-agnostic: pass any `--location` (city, region, country, or "Remote").