fix(cli): remove duplicate argument in npm view commands

[hobostay]

Summary

Fix malformed npm view commands in the CLI create-app tool. The trailing latest argument was being interpreted as a second field name to query, not as a tag flag.

Root Cause

Two npm view commands in apps/cli/src/create-app/index.ts have a duplicate latest argument:

# Before (bug): queries both 'version' AND 'latest' fields
npm view @flowgram.ai/demo-fixed-layout version --tag=latest latest
npm view @flowgram.ai/core version --tag=latest latest

# After (fix): correctly queries only 'version' field  
npm view @flowgram.ai/demo-fixed-layout version
npm view @flowgram.ai/core version

The npm view <pkg> <field1> <field2> syntax queries multiple fields. The trailing latest was being treated as a field name, causing the output to include both the version and an undefined latest field, which could corrupt the version string.

Note: npm view already defaults to the latest tag, so --tag=latest is unnecessary.

Test plan

• Verify npm view @flowgram.ai/demo-fixed-layout version returns a clean version string
• Verify npm view @flowgram.ai/core version returns a clean version string

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[sanmaopep]

@hobostay please sign the CLA so we can continue to CI