Switch from asdf to mise-en-place in bare-metal evals setup script

[cte]

Important

Switch from asdf to mise for managing language runtimes in setup.sh, simplifying the script by removing asdf specific logic.

• Behavior:
  • Switch from asdf to mise for managing language runtimes in setup.sh.
  • Remove asdf specific logic, including plugin checks and installations.
  • Use mise to install and set global versions for Node.js, Python, Go, Rust, and Java.
• Installation:
  • Check for mise installation and prompt user to install if not present.
  • Use mise commands to activate and set up shell environment.
• Misc:
  • Remove has_asdf_plugin function and related logic.
  • Update comments and instructions to reflect mise usage.

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[roomote]

Rooviewer   See task on Roo Cloud

Review complete. The refactoring from asdf to mise-en-place is clean and functionally equivalent. No issues found.

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}