Improve Apollo MCP skills and documentation

[SamuelTElliott]

Summary

Improves Apollo workflow skills and the public documentation for the Apollo MCP plugin across Claude Code, Cowork, and Cursor.

• Adds onboarding and inbound website visitor workflows.
• Updates prospecting, enrichment, sequencing, and analytics guidance with clearer approval gates and seller-facing outputs.
• Adds official Apollo API-key and OAuth guidance for builders who need to call Apollo directly from their application.
• Refreshes the README with a client-neutral title, supported workflows, separate Claude Code/Cowork/Cursor installation instructions, authentication, and safety guidance.

Scope

This PR changes plugin skill guidance and public documentation only.

It does not add MCP tools or API endpoints, modify hosted MCP tool descriptions, include local tunnel or credential material, or include evaluation transcripts.

The repository includes reusable workflow skill files, but this PR does not claim that every MCP client automatically installs or invokes them. Replit skill distribution is intentionally outside this PR while Apollo confirms the supported partner delivery path with Replit.

Validation

• Validated all six SKILL.md files and their manifests locally.
• Checked the seven-file PR diff for whitespace errors.
• Rebased the branch onto current main and verified that Cursor installation guidance remains present.

[orca-security-us]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[SamuelTElliott]

Closing as superseded by #9, which is the current lean public-skills PR. The current scope keeps five canonical public skills and moves Replit-specific onboarding and website-visitor content to the private overlay in apolloio/seller-safe-apollo-mcp-prototype-temp#4. Closing this older draft to keep engineering review focused.