feat: validate the positional name argument against the project name rules

[beeman]

Why

The positional CLI name argument flowed straight from input.args[0] into the generated package.json name and the init-script rename search key without ever passing through validateProjectName — only the interactive prompt path validated. So npx create-solana-dapp My_App bypassed validation entirely and produced an invalid npm package name and a degenerate rename search key.

What

• Run validateProjectName on the positional argument in getArgs when it is provided (the same rule as the interactive prompt, including the Directory already exists check) and throw with the validation message on failure, matching the existing log.error + throw pattern.
• Validation runs immediately after argument parsing, before fetchTemplateData, so a network failure can't mask the name-validation error. The informational --list-* commands skip it, since they only use the name to build a hint.
• Test coverage for both rejection paths (including asserting the template fetch is never reached) and for the list-command exemption, plus a minor changeset.

Notes

Stacked on #274 (targets beeman/project-name-schema); retarget to main or rebase once that merges.

[changeset-bot]

🦋 Changeset detected

Latest commit: 1d87885

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
create-solana-dapp	Minor

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[pkg-pr-new]

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commit: 1d87885

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge, with the previously reported ordering and informational-command issues fully addressed.

Summary

This PR validates positional project names before template retrieval while exempting informational list commands.

• Applies the same project-name and existing-directory checks used by the interactive flow.
• Ensures invalid names fail before any template network request.
• Adds regression coverage for invalid names, existing directories, and list-command behavior.
• Adds a minor release changeset.

_{Reviews (6) · Last reviewed commit: "feat: validate the positional name argum..."}

[beeman]

@greptileai review

[beeman]

@greptileai review