docs: add Prerequisites section and fix copilot -i flag

[abeltrano]

Summary

This PR addresses two documentation issues:

Prerequisites section (fixes #9)

Adds a Prerequisites section to README.md (above Quick Start) listing each required/optional external tool with install links:

• Git with link to git-scm.com
• GitHub Copilot CLI GitHub CLI + Copilot extension install instructions
• Claude Code link to Anthropic docs

Also adds a cross-reference note in CONTRIBUTING.md pointing readers to the README prerequisites.

Fix copilot -i flag (fixes #10)

Adds the missing -i flag to all copilot commands so they start an interactive session instead of producing an Invalid command format error.

Fixes #9
Fixes #10

[Copilot]

Pull request overview

Adds missing prerequisite/tooling guidance and corrects gh copilot documentation so the Quick Start and contributing workflow work as written.

Changes:

• Add a Prerequisites section to README.md with install links for Git and supported LLM CLI tools.
• Fix gh copilot commands by adding the required -i flag for interactive mode.
• Add a note in CONTRIBUTING.md pointing readers to the README prerequisites.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
README.md	Documents prerequisite tools + fixes gh copilot invocation to use interactive mode.
CONTRIBUTING.md	Cross-references prerequisites and fixes gh copilot invocation to use interactive mode.

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💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

This PR updates PromptKit’s documentation to (1) explicitly document external tooling prerequisites and (2) fix gh copilot command examples to use interactive mode.

Changes:

• Add a new Prerequisites section to README.md with install links for required/optional CLI tools.
• Add a cross-reference note in CONTRIBUTING.md pointing contributors to the README prerequisites.
• Update documented gh copilot commands to include -i for interactive sessions.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
README.md	Adds a Prerequisites section and updates the Quick Start Copilot command to gh copilot -i.
CONTRIBUTING.md	Adds a note linking to prerequisites and updates the Copilot workflow command to gh copilot -i.

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💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

This PR improves the repository’s onboarding documentation by explicitly documenting required external tools and correcting gh copilot usage so the Quick Start and contributing workflow run as written.

Changes:

• Add a Prerequisites section to README.md with install links for Git and supported LLM CLIs, plus a pointer to the manual flow.
• Update documented gh copilot invocations to include -i for interactive mode.
• Add a note in CONTRIBUTING.md linking back to the README prerequisites.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
README.md	Adds prerequisites + fixes Quick Start gh copilot command to use interactive mode.
CONTRIBUTING.md	Adds prerequisites cross-reference + fixes gh copilot command to use interactive mode.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.