Add quickstart-guide skill for interactive Quickstart learning

[sfc-gh-ghernandez]

Skill that takes a Snowflake Quickstart URL, fetches the source markdown from GitHub, parses it into stages, checks the learner environment, and delivers a guided interactive learning experience with learner and builder modes.

Skill submission checklist

Before submitting, please confirm the following:

Folder structure

• My skill lives at skills/<my-skill-id>/
• The folder name matches the id field in SKILL.md (lowercase, hyphens only)
• SKILL.md is present in the skill folder
• LICENSE is present in the skill folder

Frontmatter

• name field is filled in
• description field clearly explains what the skill does, when to use it, and what triggers it
• id field matches the folder name
• authors field includes the contributor's name
• type is set to community or snowflake
• status is set to stable, beta, or draft
• categories includes at least one relevant tag

License

• Community contributors: LICENSE is Apache 2.0
• Snowflake employees: LICENSE is the Snowflake Skills License

Testing

• I tested this skill in a Cortex Code session against my example prompt
• The skill behavior matches what is described in the description field

Optional

• Supporting files (templates, examples) are organized into templates/ or references/ subdirectories
• I checked that my skill name does not conflict with a bundled Cortex Code skill (run /skill in a session to verify)

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Describe your skill:

See README

Example prompt that triggers it:

See README