Update ai-config skills copy messaging w/ up-to-date/failed, don't call in step-by-step

[damyanpetev]

Description

Update ai-config skills copy messaging to account for up-to-date files and possible failures.
Also made optional and skipped when called from Step-by-step, since the skills are in the template anyway ATM.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring / code cleanup
• Build / CI configuration change

Affected Packages

• igniteui-cli (packages/cli)
• @igniteui/cli-core (packages/core)
• @igniteui/angular-templates (packages/igx-templates)
• @igniteui/angular-schematics (packages/ng-schematics)
• @igniteui/mcp-server (packages/igniteui-mcp)

Checklist

• I have tested my changes locally (npm run test)
• I have built the project successfully (npm run build)
• I have run the linter (npm run lint)
• I have added/updated tests as needed
• My changes do not introduce new warnings or errors

Additional Context

[coveralls]

coverage: 86.278% (+0.09%) from 86.193% — dpetev/refactor-skills-copy-messaging into master

[Copilot]

Pull request overview

Updates the ai-config workflow to better report AI skills synchronization results (up-to-date vs updated vs failed) and skips copying skills during the step-by-step project flow (since skills are currently included in templates).

Changes:

• Refactors copyAISkillsToProject() to return structured copy results (found/skipped/failed) and only write when content differs.
• Updates CLI ai-config output messaging based on copy results (no source, failures, up-to-date).
• Adjusts step-by-step flow to call ai-config without skills, plus corresponding unit test updates.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
spec/unit/ai-skills-spec.ts	Adds spies for logging and a new test for “up-to-date” skip behavior.
spec/unit/PromptSession-spec.ts	Updates expectations to ensure aiConfig.configure(false) is used from PromptSession.
packages/core/util/ai-skills.ts	Changes skills copy to diff-based writes and returns a structured result object.
packages/cli/lib/commands/ai-config.ts	Updates user-facing messaging and makes skills copying optional via configure(skills = true).
packages/cli/lib/PromptSession.ts	Skips skills configuration during step-by-step by calling aiConfigure(false).

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