feat: add siwx cloud auth storage

[zoruka]

Description

Please include a brief summary of the change.

Type of change

• Chore (non-breaking change that addresses non-functional tasks, maintenance, or code quality improvements)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Associated Issues

For Linear issues: Closes APKT-xxx
For GH issues: closes #...

Showcase (Optional)

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If new feature is being introduced, include the link to demo recording.

Checklist

• Code in this PR is covered by automated tests (Unit tests, E2E tests)
• My changes generate no new warnings
• I have reviewed my own code
• I have filled out all required sections
• I have tested my changes on the preview link
• Approver of this PR confirms that the changes are tested on the preview link

[changeset-bot]

⚠️ No Changeset found

Latest commit: bbb3561

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[github-actions]

Coverage Report for Coverage

Status	Category	Percentage	Covered / Total
🔵	Lines	331.09%	4512 / 19080
🔵	Statements	331.09%	4512 / 19080
🔵	Functions	367.49%	371 / 1097
🔵	Branches	465.62%	682 / 1391

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/siwx/src/storages/CloudAuth.ts	26.78%	100%	0%	26.78%	7-11, 14-15, 18-39, 42-43, 46-60
packages/siwx/src/storages/index.ts	100%	100%	100%	100%

Generated in workflow #7301 for commit c30c03a by the Vitest Coverage Report Action