ui: introduce form injection for provider modals

[lily-de]

• Moves files around
• Gets rid of getActions in provider registry
• Sets up using custom forms with custom submit buttons to handle the forms

no state related stuff -- tried but there's something not quite right with the config for providers (can't get keychain info), so next pr

[michaelneale]

looks pretty reasonable - large one - what is best way to review?

[michaelneale]

.bundle

[github-actions]

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[alexhancock]

We should consider if we should use this, and if we can unify with what I had here for the top level of the settings page model radio buttons

goose/ui/desktop/src/components/settings_v2/SettingsView.tsx

Lines 90 to 96 in 2f00765

	<input
	type="radio"
	name="model"
	checked={model.selected}
	onChange={() => handleModelSelect(model.id)}
	className="h-4 w-4 text-white accent-[#393838] bg-[#393838] border-[#393838] checked:bg-[#393838] focus:ring-0 focus:ring-offset-0"
	/>