Use the shared section names in the README

Installation -> Quick start, and the build commands move into it so the file
ends on Layout then More like every other repo.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WsxkJEmqEECM1PygXdN1zU

README.md

@@ -15,7 +15,7 @@ kernel; run `tools/inventory.py` for the current count. Adding a class is a
 routine, documented change, see
 [docs/adding-symbols.md](docs/adding-symbols.md).
 
-## Installation
+## Quick start
 
 The packages sit on our Gitea instance, so install by pointing at its index:
 
@@ -27,6 +27,17 @@ uv pip install --index-url https://git.stroblme.de/api/packages/N3XD/pypi/simple
 Versions are `<occt-version>.N`, enforced at configure time against the OCCT
 actually found.
 
+Wheels are built on a dev box and published to that registry. To build one
+yourself, everything runs in the OCCT builder image, so Docker is the only
+prerequisite:
+
+```bash
+make image    # compiles OCCT 8.0.1 into the builder image
+make dev      # incremental compile + tests
+make wheel    # compile, stubs, auditwheel, self-containment smoke test
+make publish  # publish to Gitea using .secret credentials
+```
+
 ## Usage
 
 `OCP` mirrors `cadquery-ocp` symbol-for-symbol, so code written against it runs
@@ -99,19 +110,6 @@ builder.perform()
 | `occt/` | The Dockerfile that compiles OCCT 8.0.1 into the builder image |
 | `tools/` | Inventory, signature diffing against upstream, and benchmarks |
 
-## Build
-
-Wheels are built on a dev box and published to the
-[Gitea package registry](https://git.stroblme.de/api/packages/N3XD/pypi). To
-build one yourself:
-
-```bash
-make image    # compiles OCCT 8.0.1 into the builder image
-make dev      # incremental compile + tests
-make wheel    # compile, stubs, auditwheel, self-containment smoke test
-make publish  # publish to Gitea using .secret credentials
-```
-
 ## More
 
 - [docs/design.md](docs/design.md) — the decisions and the handle model