Reorganize tasks: move dependency installation to setup

- Moved 'install' task from docs to setup as 'deps'
- Added dependencies to setup:deps (requires node and pnpm)
- Logical separation:
  - setup: Environment and dependency installation
  - docs: Documentation workflow (dev, build, preview)

New task structure:
Setup tasks:
- setup:node: Install Node.js if missing
- setup:pnpm: Install pnpm if missing
- setup:deps: Install VitePress dependencies

Docs tasks:
- docs:dev: Development server
- docs:build: Build site
- docs:preview: Preview built site

tasks/Taskfile.docs.yml

@@ -5,12 +5,6 @@ version: '3'
 silent: true
 
 tasks:
-  install:
-    desc: "Install VitePress dependencies using pnpm"
-    silent: true
-    cmds:
-      - pnpm install
-
   dev:
     desc: "Run local dev server to preview the docs"
     silent: true
@@ -27,4 +21,4 @@ tasks:
     desc: "Preview the built docs website"
     silent: true
     cmds:
-      - pnpm docs:preview
+      - pnpm docs:preview

tasks/Taskfile.setup.yml

@@ -0,0 +1,41 @@
+# https://taskfile.dev
+
+version: '3'
+
+silent: true
+
+tasks:
+  homebrew:
+    desc: "Check if Homebrew is installed"
+    silent: true
+    internal: true
+    preconditions:
+      - sh: "command -v brew >> /dev/null"
+        msg: "Please install Homebrew"
+
+  pnpm:
+    desc: "Check if pnpm is installed and install it if missing"
+    deps:
+      - homebrew
+    cmds:
+      - brew install pnpm
+    status:
+      - command -v pnpm >> /dev/null
+
+  node:
+    desc: "Check if Node.js® is installed and install it if missing"
+    deps:
+      - homebrew
+    cmds:
+      - brew install node
+    status:
+      - command -v node >> /dev/null
+
+  deps:
+    desc: "Install VitePress dependencies using pnpm"
+    deps:
+      - node
+      - pnpm
+    cmds:
+      - pnpm install
+