Fix review issues: front matter, headings, consistency, typos

- Move title and last_modified to YAML front matter (all policy docs)
- Make all document sections H1, subsections H2
- Update version rule to reference front matter format
- Fix "our" → "your" typo in Go styleguide
- Fix Python styleguide numbering (2. → 1.)
- Fix README: "flat collection" → accurate description, remove stale TODO
- Remove Makefile items from code styleguides (repo stuff, not code),
  add note linking to Repository Policies
- Change zerolog → slog in Go styleguide
- Fix JS styleguide npm reference: both work, but use make targets
- Drop .json from healthcheck path, add JSON content-type requirement
- Add Author/License to Go HTTP Server Conventions
- Convert hyperlinks to backtick URLs in checklists for consistency
- Add version/front matter to both checklists

prompts/NEW_REPO_CHECKLIST.md

@@ -1,18 +1,21 @@
-# New Repo Checklist
+---
+title: New Repo Checklist
+last_modified: 2026-02-22
+---
 
 Use this checklist when creating a new repository from scratch. Follow the steps
-in order. Full policies are at:
-`https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/REPO_POLICIES.md`
+in order. Full policies are at
+`https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/REPO_POLICIES.md`.
 
 Template files can be fetched from:
 `https://git.eeqj.de/sneak/prompts/raw/branch/main/<path>`
 
-## 1. Initialize
+# 1. Initialize
 
 - [ ] `git init`
 - [ ] Ask the user for the license (MIT, GPL, or WTFPL)
 
-## 2. First Commit (README only)
+# 2. First Commit (README only)
 
 - [ ] Create `README.md` with all required sections:
     - [ ] **Description**: name, purpose, category, license, author
@@ -24,28 +27,29 @@ Template files can be fetched from:
     - [ ] **Author**: [@sneak](https://sneak.berlin)
 - [ ] `git add README.md && git commit`
 
-## 3. Scaffolding (feature branch)
+# 3. Scaffolding (feature branch)
 
 - [ ] `git checkout -b initial-scaffolding`
 
-### Fetch Template Files
+## Fetch Template Files
 
-- [ ] [`.gitignore`](https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore)
-      — fetch from prompts repo, extend for language-specific artifacts
-- [ ] [`.editorconfig`](https://git.eeqj.de/sneak/prompts/raw/branch/main/.editorconfig)
-      — fetch from prompts repo
-- [ ] [`Makefile`](https://git.eeqj.de/sneak/prompts/raw/branch/main/Makefile) —
-      fetch from prompts repo, adapt targets for the project's language and
-      tools
-- [ ] For JS/docs repos:
-      [`.prettierrc`](https://git.eeqj.de/sneak/prompts/raw/branch/main/.prettierrc),
-      [`.prettierignore`](https://git.eeqj.de/sneak/prompts/raw/branch/main/.prettierignore)
+- [ ] `.gitignore` — fetch from
+      `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitignore`, extend for
+      language-specific artifacts
+- [ ] `.editorconfig` — fetch from
+      `https://git.eeqj.de/sneak/prompts/raw/branch/main/.editorconfig`
+- [ ] `Makefile` — fetch from
+      `https://git.eeqj.de/sneak/prompts/raw/branch/main/Makefile`, adapt
+      targets for the project's language and tools
+- [ ] For JS/docs repos: `.prettierrc` and `.prettierignore` — fetch from
+      `https://git.eeqj.de/sneak/prompts/raw/branch/main/.prettierrc` and
+      `https://git.eeqj.de/sneak/prompts/raw/branch/main/.prettierignore`
 
-### Create Project Files
+## Create Project Files
 
 - [ ] `LICENSE` file matching the chosen license
-- [ ] [`REPO_POLICIES.md`](https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/REPO_POLICIES.md)
-      — fetch from prompts repo
+- [ ] `REPO_POLICIES.md` — fetch from
+      `https://git.eeqj.de/sneak/prompts/raw/branch/main/prompts/REPO_POLICIES.md`
 - [ ] `Dockerfile` and `.dockerignore`
     - All Dockerfiles must run `make check` as a build step
     - Server: also builds and runs the application
@@ -53,14 +57,14 @@ Template files can be fetched from:
     - Image pinned by sha256 hash with version/date comment
 - [ ] Gitea Actions workflow at `.gitea/workflows/check.yml` that runs
       `docker build .` on push — reference
-      [`check.yml`](https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitea/workflows/check.yml)
+      `https://git.eeqj.de/sneak/prompts/raw/branch/main/.gitea/workflows/check.yml`
 - [ ] Language-specific:
-    - [ ] Go: `go mod init sneak.berlin/go/<name>`,
-          [`.golangci.yml`](https://git.eeqj.de/sneak/prompts/raw/branch/main/.golangci.yml)
+    - [ ] Go: `go mod init sneak.berlin/go/<name>`, `.golangci.yml` (fetch from
+          `https://git.eeqj.de/sneak/prompts/raw/branch/main/.golangci.yml`)
     - [ ] JS: `yarn init`, `yarn add --dev prettier`
     - [ ] Python: `pyproject.toml`
 
-### Configure Makefile
+## Configure Makefile
 
 - [ ] `make test` — runs project tests (30-second timeout)
 - [ ] `make lint` — runs linter
@@ -70,7 +74,7 @@ Template files can be fetched from:
 - [ ] `make docker` — builds Docker image
 - [ ] `make hooks` — installs pre-commit hook
 
-## 4. Verify
+# 4. Verify
 
 - [ ] `make check` passes
 - [ ] `make docker` succeeds
@@ -79,7 +83,7 @@ Template files can be fetched from:
 - [ ] No unnecessary files in repo root
 - [ ] All dates written as YYYY-MM-DD
 
-## 5. Merge and Set Up
+# 5. Merge and Set Up
 
 - [ ] Commit, merge to `main`
 - [ ] `make hooks` to install pre-commit hook