feat(icp-cli): route web identity flows to specialized skills

[marc0olo]

Summary

Resolves #218. Replaces the thin web-identity stub in skills/icp-cli/SKILL.md with a routing pointer to the two specialized skills that now own icp identity link web (both prerequisites — #212 deploy-to-cloud-engine and #217 agent-web-identity — have merged).

The old stub had two bare command examples with no --auth vs --app distinction, no stdin "Press Enter" warning, and no pitfalls — worse than nothing, since an agent could pick them up and run the command blind.

Change

-### Using the cli with a web identity
-...two bare `icp identity link web ... --app` examples...
+### Web identity flows
+- `deploy-to-cloud-engine` — link the CLI to a cloud engine console with `--auth <console-origin>`, then deploy to the engine's subnet
+- `agent-web-identity` — obtain a delegation for an app-specific principal with `--app <domain>`, then make canister calls as the user

Verification

• Confirmed each target skill's actual flag against its source:
  • deploy-to-cloud-engine uses --auth <console-origin> ✓
  • agent-web-identity uses --app <domain> ✓
• npm run validate → all 26 skills pass (only pre-existing unrelated warnings).

Evals

No case in evaluations/icp-cli.json referenced the removed content, so nothing breaks. No new cases added: this is a pure scope reduction with no new agent-facing behavior to regression-test, and a should_not_trigger guard for cloud-engine deploys would fight icp-cli's intentionally broad description ("deploying any IC project", "identity management").

Closes #218

[github-actions]

Skill Validation Report

Validating skill: /home/runner/work/icskills/icskills/skills/icp-cli

Structure

• Pass: SKILL.md found
• Pass: all files in references/ are referenced

Frontmatter

• Pass: name: "icp-cli" (valid)
• Pass: description: (626 chars)
• Pass: license: "Apache-2.0"
• Pass: metadata: (2 entries)

Tokens

• Warning: SKILL.md body is 6606 tokens (spec recommends < 5000)

Markdown

• Pass: no unclosed code fences found

Tokens

File	Tokens
SKILL.md body	6,606
references/binding-generation.md	1,031
references/dev-server.md	690
references/dfx-migration.md	2,620
Total	10,947

Content Analysis

Metric	Value
Word count	3,570
Code block ratio	0.16
Imperative ratio	0.11
Information density	0.14
Instruction specificity	0.85
Sections	20
List items	70
Code blocks	34

References Content Analysis

Metric	Value
Word count	2,133
Code block ratio	0.25
Imperative ratio	0.13
Information density	0.19
Instruction specificity	0.80
Sections	18
List items	33
Code blocks	12

Contamination Analysis

Metric	Value
Contamination level	low
Contamination score	0.12
Primary language category	shell
Scope breadth	3

• Warning: Language mismatch: config, javascript (2 categories differ from primary)

References Contamination Analysis

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

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

Result: 1 warning

Project Checks

✓ Project checks passed for 1 skills (0 warnings)