SV governance UI/UX improvements #444 - Milestone 1: SV UI Shared Component Library

[pedrodneves]

Milestone 1: SV UI Shared Component Library

• Reviewed and accepted by Splice maintainers: target 3 weeks after grant approval (Digital Asset's day-level estimate for this milestone already accounts for review)
• Scope: the remaining Look & Feel components plus the Initiate Proposal page that composes them, estimated using Digital Asset's own day-level estimates.
• Value metrics: each component matches the established SV UI design system and is covered by a basic render test; all 8 components are available for use by the page-level issues in Milestone 2.
• Definition of done: the in-scope pull requests are reviewed and accepted by the Splice maintainers.

GitHub pull requests submitted for:

• #2654 SV UI Redesign Look & Feel: Component: ActionSelection
• #2652 SV UI Redesign Look & Feel: Component: Dropdown
• #2655 SV UI Redesign Look & Feel: Component: RadioSelector
• #2656 SV UI Redesign Look & Feel: Component: TextArea
• #2657 SV UI Redesign Look & Feel: Component: TextInput
• #2659 SV UI Redesign Look & Feel: Component: ConfigurationEntry
• #2660 SV UI Redesign Look & Feel: Component: Accordion
• #2661 SV UI Redesign Look & Feel: Component: JsonDiff
• #2623 SV UI Redesign Look & Feel: Page: Governance (Initiate proposal)

Milestone	Build hours	Review hours	PM hours	USD amount	CC amount
Milestone 1: SV UI Shared Component Library	92	46	14	$44,550	297,000 CC

Originally posted by @pedrodneves in #444 (comment)

[hythloda]

Dupe