feat: add FIS experiment template browser

[YoungJinJung]

Summary

Add an FIS experiment template browser to unic.

Scope

• List FIS experiment templates
• Show description, target resources, actions, and stop conditions
• Allow users to inspect template detail without leaving the TUI

Acceptance Criteria

• FIS appears as a service in the catalog
• Template list and detail screens are available in the TUI
• Template detail includes targets, actions, role, and stop condition summaries
• Tests cover template mapping and navigation
• README is updated

[YoungJinJung]

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[YoungJinJung]

@Unic-bot: assign me

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@YoungJinJung has been assigned to this issue.

[YoungJinJung]

@Unic-bot: assign me

[github-actions]

@YoungJinJung has been assigned to this issue.