Handle both string and array outputs from npm view in find-release-plan-version

[Copilot]

npm view returns a string when a semver range matches a single version, but an array when multiple versions match. The existing jq command .[-1] fails on string inputs.

Changes

• Updated jq expression to handle both types: if type == "array" then .[-1] else . end
• Returns last element for arrays, the value itself for strings

Example

# Single match returns string
npm view release-plan@^0.17.2 version --json  # "0.17.2"

# Multiple matches return array  
npm view release-plan@^0.17.0 version --json  # ["0.17.0", "0.17.1", "0.17.2"]

# New jq command handles both correctly
jq -r 'if type == "array" then .[-1] else . end'  # → "0.17.2"

Original prompt

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This section details on the original issue you should resolve

<issue_title>npm version output is inconsistent, leads to error</issue_title>
<issue_description>
npm view release-plan@^0.17.2 version --json -> "0.17.2"
npm view release-plan@^0.17.0 version --json -> [ "0.17.0", "0.17.1", "0.17.2" ]

if you have the later version specification in your package.json, it works, as it currently expects an array

the former, fails

We need to make find-replease-plan-version handle both ways</issue_description>

<agent_instructions>Fix find-release-plan-version.yml to work whether npm view returns a string with one version or an array of versions</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes npm version output is inconsistent, leads to error #6

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