Feat/resource selector and solid builder

[nank1ro]

• Add the select method on the Resource class. The select function allows filtering the Resource's data by reading only the properties that you care about. The advantage is that you keep handling the loading and error states.
• Make the Resource to auto-resolve when accessing its state.
• Fix solidart_lint issues with invalid_observe_type and invalid_update_type not linting for dynamic
• The Solid widget now acceps a builder method that provides a descendant context.

[codecov[bot]]

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