chore: Add information about using mainnet identities with pocket ic.

[raymondk]

No description provided.

[github-actions]

Skill Validation Report

Validating skill: /home/runner/work/icskills/icskills/skills/internet-identity

Structure

• Pass: SKILL.md found

Frontmatter

• Pass: name: "internet-identity" (valid)
• Pass: description: (323 chars)
• Pass: license: "Apache-2.0"
• Pass: compatibility: (31 chars)
• Pass: metadata: (2 entries)

Markdown

• Pass: no unclosed code fences found

Tokens

File	Tokens
SKILL.md body	1,766
Total	1,766

Content Analysis

Metric	Value
Word count	1,047
Code block ratio	0.31
Imperative ratio	0.12
Information density	0.21
Instruction specificity	1.00
Sections	8
List items	11
Code blocks	2

Contamination Analysis

Metric	Value
Contamination level	low
Contamination score	0.03
Primary language category	config
Scope breadth	2

• Warning: Language mismatch: javascript (1 category differ from primary)

Result: passed

Project Checks

✓ Project checks passed for 1 skills (0 warnings)

[marc0olo]

I think we can improve the text a bit for targeting agents specifically.

But I don't think it matters too much.