feat: Add disabled_in_editor_play option

[limbonaut]

Add an option to disable SDK when the project is run from within the Godot editor.

• Resolves Add an easy way to disable SDK during editor dev runs #251
• Resolves Impossible to deactivate sentry for debug runtime build #236

[github-actions]

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📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

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[jpnurmi]

nitpick: double-negation

[limbonaut]

@jpnurmi We already have a flag called enabled, so we’re using disabled_in_x here to indicate an exception from the general rule. If enabled is false, we don’t consider disabled_* flags at all. Hence the name.