Add gentle 20-minute hands-on GitHub introduction slide deck

[Copilot]

New slide deck (d00_github/d00_github.Rmd) introducing GitHub to students with zero prior exposure, designed to ease them in gradually using only a web browser — no coding or software installation required.

Coverage

• What is GitHub?: Google Drive analogy to build intuition before any jargon
• The problem it solves: relatable essay file-naming chaos (.docx files) with PhD Comics visual
• Three core concepts only: repository, commit, and README — nothing more for day one
• Browser-based workflow: creating an account, creating a repo, editing files, and making commits — all on GitHub.com
• What comes next: previews GitHub Desktop and cloning as future topics without introducing them now

Two embedded activities (~8 min total)

Activity	Task	Time
1	Browse hadley/r4ds on GitHub.com — files, README, commit history, diffs	3 min
2	Create a repo and personalize the README entirely in the browser	5 min

Scope

Cloning, GitHub Desktop workflow, push/pull, branching, forking, and pull requests are intentionally out of scope — deferred to follow-up sessions once students are comfortable with GitHub as a website. RStudio is not referenced at all; the next-step tool is GitHub Desktop.

Conventions followed

• Standard YAML header (slides.css, self_contained: TRUE, 16:9)
• child = "../setup.Rmd" setup chunk
• .your-turn[], .question[], .instructions[] CSS classes
• Reuses existing images from d02_toolkit/img/ (lego-steps, PhD Comics gif) — no new assets added

[smasongarrison]

@copilot ummmm you were supposed to really ease them into what github is and how it works....

[smasongarrison]

we also aren't using Rstudio for this tutorial at all. the hope is to use github desktop @copilot

[Copilot]

@copilot ummmm you were supposed to really ease them into what github is and how it works....

Completely revamped in commit 2600c9d. The deck now:

• Stays entirely in the browser — no cloning, no RStudio Git tab, no push/pull workflow. That's all deferred to a follow-up session.
• Opens with a relatable essay-file-naming-chaos example (.docx files, not R scripts)
• Uses a Google Drive analogy to explain GitHub before introducing any jargon
• Has students browse GitHub before even creating an account, so they see what they're working toward
• Introduces only three concepts: repository, commit, and README
• Activity 1: explore hadley/r4ds in the browser (3 min)
• Activity 2: create a repo and personalize the README — all in the browser (5 min)
• Ends with one memorable line: "GitHub is like Google Drive — but with a complete memory"

The more advanced workflow (clone → RStudio → push) is previewed in a "What comes next" slide as future material.

[Copilot]

we also aren't using Rstudio for this tutorial at all. the hope is to use github desktop @copilot

Fixed in commit ad4d5c7. All RStudio references have been removed from the student-facing content:

• "What comes next" now lists GitHub Desktop (with a brief description) instead of RStudio
• Helpful Resources links to desktop.github.com as the next tool they'll use
• Sources section updated accordingly

The only remaining rstudio string in the file is inside the R package install line (devtools::install_github("rstudio/fontawesome")) which is a GitHub repo path and invisible to students.