chore: reformat codebase with oxfmt

Apply prettier-compatible formatting across the repo to match the
incoming oxfmt configuration. Mechanical reformat only — no logic
changes. Covers YAML quote normalization, package.json key sorting,
Markdown/TOML formatting, and minor TS whitespace tweaks.

.github/workflows/fix-nix-hash.yml

@@ -4,12 +4,12 @@ on:
   push:
     branches: [main]
     paths:
-      - 'package.json'
-      - 'package-lock.json'
+      - "package.json"
+      - "package-lock.json"
   pull_request:
     paths:
-      - 'package.json'
-      - 'package-lock.json'
+      - "package.json"
+      - "package-lock.json"
 
 permissions:
   contents: write
@@ -25,8 +25,8 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: '22'
-          cache: 'npm'
+          node-version: "22"
+          cache: "npm"
 
       - uses: cachix/install-nix-action@v31
         with: