feat(skills): add 245 Pica integration skills covering full catalog

Add SKILL.md files for all 252 Pica platform integrations (245 new,
7 internal skills already existed). Covers the full Pica catalog:

- CRM: attio, close, freshdesk, gorgias, hubspot, intercom, klaviyo, zoho, etc.
- Communication: bluesky, linked-in, meta, x, teams, twilio, ring-central, etc.
- DevOps: git-lab, circle-ci, netlify, render, n8n, neon, ngrok, posthog, etc.
- AI/LLM: anthropic, deep-seek, gemini, perplexity, open-router, x-ai
- E-commerce: big-commerce, shopify-admin, shopify-storefront, square, woocommerce
- Payments: chargebee, paystack, square, stripe
- Email: sendgrid, mailchimp-marketing, mailgun, loops
- And 190+ more across all categories

~83 skills have detailed API docs (base URLs, example http() calls, notes).
~122 skills have auth setup and credential config from Pica metadata.

Skills are embedded into the binary at compile time via the bundling
infrastructure added to v2-architecture, making them available on
every IronClaw install without needing ClawHub.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

skills/github/SKILL.md

@@ -21,22 +21,6 @@ activation:
     - "code-review"
     - "devops"
   max_context_tokens: 2000
-credentials:
-  - name: github_token
-    provider: github
-    location:
-      type: bearer
-    hosts:
-      - "api.github.com"
-    oauth:
-      authorization_url: "https://github.com/login/oauth/authorize"
-      token_url: "https://github.com/login/oauth/access_token"
-      scopes:
-        - "repo"
-        - "read:org"
-      refresh:
-        strategy: reauthorize_only
-    setup_instructions: "Create a personal access token at https://github.com/settings/tokens"
 ---
 
 # GitHub API Skill