docs: lead install instructions with uv, pip as alternative

README and Quickstart now show ``uv add openarmature`` first, with
``pip install openarmature`` as the alternative line. Matches the
project's "uv for everything" convention (per AGENTS.md) while
keeping the pip path visible for readers who haven't moved to uv yet.

README still keeps the ``uv add --editable /path/...`` pattern as
the standalone "for editable local development" example.

Author: chris-colinsky

README.md

@@ -7,11 +7,14 @@ Python reference implementation of [OpenArmature](https://github.com/LunarComman
 ## Install
 
 ```bash
-pip install openarmature             # core
-pip install 'openarmature[otel]'     # with OpenTelemetry observability
+uv add openarmature                  # core
+uv add 'openarmature[otel]'          # with OpenTelemetry observability
+# or, with pip:
+pip install openarmature
+pip install 'openarmature[otel]'
 ```
 
-Or for editable local development:
+For editable local development:
 
 ```bash
 uv add --editable /path/to/openarmature-python

docs/getting-started/index.md

@@ -7,6 +7,8 @@ shape on one screen.
 ## Install
 
 ```bash
+uv add openarmature
+# or, with pip:
 pip install openarmature
 ```