feat: validate local version names

[chloe41427]

When migrating the install subcommand to Rust, add validation to reject local version names that:

1. Contain special characters (commas, etc.)

   • Currently in bash, local versions with commas in the name (e.g. CE-21.0.0.2,-8) are accepted during installation but break the list output, which uses comma-separated lists to communicate version data to the server.
   • Addresses: Bug: Localy added versions with , in name are listed as multiple versions. sdkman-cli#911

2. Clash with available remote version names

   • Users should not be able to install a local version with a name that matches an existing remote version, as this would shadow the remote version and cause confusion.
   • Addresses: sdkman should reject local version names which clash with available candidate names sdkman-cli#685

Validation rules:

• Reject commas and other special characters in local version names during sdk install
• Reject local version names that match any available remote version for the candidate
• Provide clear error messages for each validation failure

This consolidates local version name validation into a single comprehensive issue for the Rust native CLI.