fix: shorten disabled policy generate description to prevent truncation

[jesseturner21]

Summary

• Shortened the disabled "Generate a Cedar policy" option description from "Requires deployed engine — run deploy first" to "Deploy engine first"
• The previous text was too long and got truncated by the SelectList component's wrap="truncate" rendering, making the end of the description invisible in narrow terminals

Evidence

Before: The description "Requires deployed engine — run deploy first" gets cut off on terminals narrower than ~80 columns due to wrap="truncate" in the SelectList component.

After: All three source method options render fully:

❯ Select a Cedar policy file - From your project
  Write a Cedar policy - Type Cedar directly
  Generate a Cedar policy - Deploy engine first

Verified via TUI test harness — all three options display completely without truncation.

Test plan

• Build succeeds (npm run build)
• TUI test: navigate to Add Policy → source method step, verify all descriptions visible
• Lint/prettier/typecheck pass (pre-commit hooks)

🤖 Generated with Claude Code

[github-actions]

Package Tarball

aws-agentcore-0.3.0-preview.6.1.tgz

How to install

npm install https://github.com/jesseturner21/agentcore-cli/releases/download/pr-7-tarball/aws-agentcore-0.3.0-preview.6.1.tgz

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	41.48%	4976 / 11995
🔵	Statements	41.1%	5272 / 12825
🔵	Functions	40.3%	910 / 2258
🔵	Branches	42.9%	3219 / 7503

Generated in workflow #32 for commit 9accdc7 by the Vitest Coverage Report Action

[jesseturner21]

do a test by creating a project, then adding an agent deploying the
agent invoking after it is deployed adn then removing the agent and
deploying to apply the removal of the agent that it deletes, perform this
and make a pr to jesseturner21 fork of agentcore-cli with the svg in a pr
comment as evidence for completion with the flow you went through
this is a prompt i am testing
putting here. to save