fix(skills): make auto-install opt-in

[rubenmarcus]

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• This repo: Closes #123
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✔️ Bundle Size Analysis

Metric	Value
Base	1705.70 KB
PR	1705.88 KB
Diff	.18 KB (0%)

Bundle breakdown

156K	dist/auth
28K	dist/automation
4.0K	dist/cli.d.ts
4.0K	dist/cli.d.ts.map
16K	dist/cli.js
12K	dist/cli.js.map
420K	dist/commands
28K	dist/config
4.0K	dist/index.d.ts
4.0K	dist/index.d.ts.map
4.0K	dist/index.js
4.0K	dist/index.js.map
536K	dist/integrations
84K	dist/llm
656K	dist/loop
172K	dist/mcp
32K	dist/presets
92K	dist/setup
28K	dist/skills
392K	dist/sources
76K	dist/ui
44K	dist/utils
328K	dist/wizard

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