docs(readme): point install at crates.io + PyPI

harmont-cli 0.0.1 is now on crates.io and harmont 0.0.1 is on PyPI,
so the quick-install path is two one-liners instead of two `git
clone` + build invocations. Build-from-source kept under a details
block for contributors.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: markovejnovic

README.md

@@ -26,22 +26,33 @@ def hello() -> hm.Step:
 
 ### 2. Install
 
-`harmont-cli` is not yet on crates.io. Install from source:
+Install the CLI from [crates.io](https://crates.io/crates/harmont-cli):
+
+```sh
+cargo install harmont-cli
+```
+
+`hm run` also needs **Docker** and **Python 3.11+** with [`harmont`](https://pypi.org/project/harmont/):
+
+```sh
+pip install harmont
+```
+
+<details>
+<summary>Or build from source (contributors)</summary>
 
 ```sh
 git clone https://github.com/harmont-dev/harmont-cli
 cd harmont-cli
 cargo build --release
 install -m 0755 target/release/hm /usr/local/bin/hm   # or any dir on $PATH
-```
-
-`hm run` also needs **Docker** and **Python 3.11+** with [`harmont-py`](https://github.com/harmont-dev/harmont-py):
 
-```sh
 git clone https://github.com/harmont-dev/harmont-py
 pip install -e ./harmont-py
 ```
 
+</details>
+
 Verify:
 
 ```sh