ci: add docs workflow with PR metadata generation

Add conditional metadata generation for PRs that modify both docs and
source files. This fixes broken link checker reports when a PR adds a
new module and documents it simultaneously - previously the link checker
would fail because metadata files are only generated on push to main.

Changes:
- Add docs-orchestrator.yml workflow with:
  - detect-changes job to check if PR touches source paths
  - pr-metadata-regen job that generates metadata and uploads as artifact
  - link-check job that downloads metadata artifact when available
  - build-site job for VitePress site generation
  - deploy-aws and crowdin-upload jobs for push events
  - Prettier formatting step before auto-commit on push

- Add Prettier for markdown formatting:
  - Add prettier ^3.2.0 as devDependency in docs/package.json
  - Add docs/.prettierrc with prose-preserving config

- Remove normalize_whitespace from metadata_sync.sh (Prettier handles
  whitespace normalization now)

Signed-off-by: Ramon Roche <mrpollo@gmail.com>

Tools/ci/metadata_sync.sh

@@ -114,18 +114,6 @@ ensure_emscripten() {
     log_verbose "Emscripten ready: $(emcc --version | head -1)"
 }
 
-# ═══════════════════════════════════════════════════════════════════════════════
-# Whitespace Normalization
-# ═══════════════════════════════════════════════════════════════════════════════
-
-normalize_whitespace() {
-    local file="$1"
-    if [[ -f "$file" ]]; then
-        # Remove trailing whitespace from each line
-        sed -i 's/[[:space:]]*$//' "$file"
-    fi
-}
-
 # ═══════════════════════════════════════════════════════════════════════════════
 # Generation Functions
 # ═══════════════════════════════════════════════════════════════════════════════
@@ -199,7 +187,6 @@ sync_parameters() {
         die "Source file not found: $src (did you run --generate?)"
     fi
 
-    normalize_whitespace "$src"
     mkdir -p "$(dirname "$dest")"
     cp "$src" "$dest"
     log_verbose "  $src -> $dest"
@@ -215,7 +202,6 @@ sync_airframes() {
         die "Source file not found: $src (did you run --generate?)"
     fi
 
-    normalize_whitespace "$src"
     mkdir -p "$(dirname "$dest")"
     cp "$src" "$dest"
     log_verbose "  $src -> $dest"
@@ -239,7 +225,6 @@ sync_modules() {
     mkdir -p "$dest_dir"
 
     for src in "${src_files[@]}"; do
-        normalize_whitespace "$src"
         local name
         name=$(basename "$src")
         cp "$src" "$dest_dir/$name"
@@ -267,7 +252,6 @@ sync_msg_docs() {
     mkdir -p "$middleware_dir"
 
     for src in "${src_files[@]}"; do
-        normalize_whitespace "$src"
         local name
         name=$(basename "$src")