fix: auto connect for aat tokens

[janb87]

Summary by Sourcery

Fix auto-connect logic to disable automatic workspace connection when using application access tokens by default, add a helper to derive auto-connect behavior, update related docs, action metadata, and tests.

Bug Fixes:

• Default auto-connect to false for application access tokens to prevent unintended connections

Enhancements:

• Introduce getAutoConnect helper to derive auto-connect behavior based on token type or explicit input
• Convert auto-connect flag to a boolean and remove its default true from action inputs

Documentation:

• Update README and action.yml to reflect new auto-connect defaults and improve formatting

Tests:

• Add test for application access token scenario to verify no login or connect is performed when auto-connect is not enabled

[sourcery-ai]

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