SKILL.md: name 'ralph-wiggum' should be 'pi-ralph-wiggum' to match package directory

[ishanmalik]

The SKILL.md frontmatter has name: ralph-wiggum, but pi expects the skill name to match the parent directory name, which is pi-ralph-wiggum (from the npm package @tmustier/pi-ralph-wiggum).

This causes a [Skill conflicts] warning on every pi startup:

[Skill conflicts]
  npm:@tmustier/pi-ralph-wiggum (user) SKILL.md
    name "ralph-wiggum" does not match parent directory "pi-ralph-wiggum"

Every pi update redownloads the package from npm, so manually patching the file doesn't stick.

Fix: In ralph-wiggum/SKILL.md, change:

name: ralph-wiggum

to:

name: pi-ralph-wiggum