Add HubSpot CRM skill example

[Kurume98]

This pull request adds a new HubSpot CRM skill example for the Lua AI Agent.
It includes:

• createContact tool (fully functional with HubSpot API)
• Zod input validation
• Skill wiring (hubspotCRM.skill.ts)
• Example README and project structure

This skill allows Lua Agents to create CRM contacts using a HubSpot Private App Token.

[rares04]

The current skill only has:

• createContact - a tool for creating a new contact
  That's it. This covers maybe 5% of what someone would actually want to do with HubSpot through a chat interface. It's like building a "Gmail skill" that can only send emails but can't read, search, reply, or manage labels.

The skill will also not work with the Lua CLI. It appears to have been written without actually running/testing against the CLI.

[Kurume98]

I've updated this PR with the completed HubSpot CRM skill. Key changes:

6 Tools Now Included:

1. createContact - Create new contacts
2. createContactFromChat - Convert chat conversations into contacts
3. updateContact - Update existing contact properties
4. updateDealStage - Move deals through pipeline stages
5. getDealPipelines - Get available pipelines and stage IDs
6. getContactActivitySummary - Get engagement history for contacts

Bug Fix:
Fixed Lua CLI bundler issue by defining inputSchema inline within each tool class (not as a separate const)

Tested:
All 6 tools compile and bundle successfully
Tested in sandbox environment - all tools working correctly
included the YAML file.
Ready for review!

[rares04]

Missing searchContacts Tool

⚠️ No way to search contacts directly. The skill has createContactFromChat which searches internally, but users can't say "Find all contacts from Acme Corp" or "Look up john@example.com". This is one of the most common CRM operations.
Missing getContact Tool

⚠️ No way to get a single contact's details by ID. Users would want to say "Show me contact 12345's info".
updateContact Missing from README
README.md Line 14-29:

⚠️ README lists 5 tools but skill has 6. updateContact is implemented but not documented in README.

---

Functionality Gap Analysis

🔴 Missing (Required for a Usable Skill)

The skill is missing the most common CRM operation — search:

Tool	Why Needed
searchContacts	"Find john@example.com", "Look up contacts at Acme Corp" — this is what users ask for 80% of the time
getContact	Get full contact details by ID (needed after search results)

Without search, users can only create/update contacts they already know the ID for.

🟡 Nice to Have (Would Make it Complete)

Tool	Why Useful
searchCompanies	B2B CRM staple — find companies by name/domain
createCompany	Create company records (with duplicate prevention like createContactFromChat)
getCompany	Get company details by ID

✅ What's Already Good

The existing 6 tools are solid and well-implemented:

• Contact CRUD (create, createFromChat, update) ✅
• Deal stage management (getPipelines, updateStage) ✅
• Activity summary for sales prep ✅

Summary

Current: 6 tools → Usable: needs 2 more → Complete: needs 5 more

At minimum, add searchContacts and getContact — these are table-stakes for any CRM skill. The company tools would round it out as a proper "HubSpot CRM" skill rather than just a "HubSpot Contacts" skill.

[Kurume98]

Summary
Fixed the concerns.
Updated the skill with tools as directed above.