Make getting started viewable on sidebar (#11874)

### Related
#11873

### What
* Adds pixi commands for the lychee install I added
* Also make the getting started side panel viewable but with the correct
re-direct.
* I ran `pixi run link-check` and it looks like it is ok

## Before
<img width="254" height="199" alt="Screenshot 2025-11-12 at 8 57 10 AM"
src="https://github.com/user-attachments/assets/a0d14307-5622-4740-8e7b-f25955896e0f"
/>

## After
<img width="254" height="322" alt="Screenshot 2025-11-12 at 9 49 35 AM"
src="https://github.com/user-attachments/assets/2a8aea28-f7d4-48e7-8773-d9094f9af263"
/>

Author: ntjohnson1

.github/workflows/reusable_checks.yml

@@ -263,19 +263,21 @@ jobs:
           key: cache-lychee-${{ github.sha }}
           restore-keys: cache-lychee-
 
+      - name: Set up pixi for PR Link Checker
+        if: ${{ inputs.CHANNEL == 'pr' }}
+        uses: prefix-dev/[email protected]
+        with:
+          pixi-version: v0.55.0
+
       # For PRs: Check only links in added lines
       - name: PR Link Checker (added lines only)
         if: ${{ inputs.CHANNEL == 'pr' }}
         run: |
-          # Install lychee
-          curl -sSL https://github.com/lycheeverse/lychee/releases/download/lychee-v0.20.1/lychee-x86_64-unknown-linux-gnu.tar.gz | tar -xz
-          sudo mv lychee /usr/local/bin/
-
           # Fetch the base branch
           git fetch origin ${{ github.base_ref }}:${{ github.base_ref }}
 
           # Run our custom PR link checker
-          python3 scripts/ci/pr_link_checker.py --base-ref origin/${{ github.base_ref }}
+          pixi run link-check-pr origin/${{ github.base_ref }}
 
       # For nightly: Check all links in the entire codebase
       - name: Full Link Checker
@@ -287,5 +289,6 @@ jobs:
           lycheeVersion: "v0.20.1"
           # When given a directory, lychee checks only markdown, html and text files, everything else we have to glob in manually.
           # Pass --verbose, so that all considered links are printed, making it easier to debug.
+          # If updating version or args update the pixi.toml to match.
           args: |
             --verbose --cache --max-cache-age 1d . --base . "**/*.md" "**/*.rs" "**/*.toml" "**/*.hpp" "**/*.cpp" "**/CMakeLists.txt" "**/*.py" "**/*.yml"

docs/content/getting-started.md

@@ -1,5 +1,5 @@
 ---
-title: Quickstart
-hidden: true
+title: Getting Started
+order: 1
 redirect: getting-started/quick-start
 ---

pixi.toml

@@ -238,6 +238,12 @@ rs-fmt = "cargo fmt --all"
 format = { depends-on = ["cpp-fmt", "misc-fmt", "pb-fmt", "py-fmt", "rs-fmt", "toml-fmt"] }
 fmt = { depends-on = ["format"] }
 
+# Check links
+link-check-pr = { cmd = "python scripts/ci/pr_link_checker.py --base-ref {{ ref }}", args = [
+  { arg = "ref" },
+] }
+link-check = 'lychee --verbose --cache --max-cache-age 1d . --base . "**/*.md" "**/*.rs" "**/*.toml" "**/*.hpp" "**/*.cpp" "**/CMakeLists.txt" "**/*.py" "**/*.yml"'
+
 # Assorted linting tasks
 fast-lint = "python scripts/fast_lint.py"
 lint-codegen = "cargo --quiet run --package re_types_builder -- --check"