Describe the bug

The current import functionality for proposals into a budgets component has several limitations that need to be addressed. Specifically:

• Proposals must have a cost assigned to be imported, which is unnecessary.
• The cost value from proposals is not correctly assigned when imported.
• The checkbox "Import all accepted proposals" should be removed.
• There is no option to filter proposals by status when importing.

To Reproduce

1. Go to a budget component in the admin panel.
2. Click on "Import proposals" from an existing proposals component.
3. Observe that:
   • Only proposals with a cost assigned can be imported.
   • The cost field from proposals is not correctly mapped to budget projects.
   • The "Import all accepted proposals" checkbox is present.
   • There is no option to filter proposals by status.

Expected behavior

• Remove the requirement that proposals must have a cost assigned to be imported.
• Remove the "Import all accepted proposals" checkbox.
• Add a new setting allowing admins to select proposals to import based on one or more statuses.
  • Label: "Import only proposals with these statuses. If none are selected, all proposals will be imported."
  • The available statuses should match the statuses defined for the proposals component from which proposals are being imported.
• The cost value entered in the "cost" field of proposals should be imported into the "budget amount" field of each corresponding project when applicable.
• Proposals that do not have a cost assigned should be given the default budget value specified in the import process.
• The "default budget" field should have the following help text: The default budget value will be assigned to all imported proposals that do not have a cost specified. If a proposal already has a cost, that value will be used instead.

Screenshots

Now

Expected

Extra data

• Decidim Version: 0.31.0.dev
• Decidim installation: Nightly