Clarify uninstallation docs (#9938)

See https://github.com/astral-sh/uv/issues/9871

> The current instructions first mention removing the binaries, and then
mention a suggestion for removing stored data. The recommended data
removal process involves uv commands that will no longer be available if
the binaries are gone 😄.

I've edited the uninstallation docs to first suggest removing stored
data before removing the uv and uvx binaries.

<img
src="https://github.com/user-attachments/assets/526fcdb3-4fd2-4e04-b895-810cb826aa11"
width="600"/>

docs/getting-started/installation.md

@@ -190,7 +190,21 @@ Then restart the shell or source the shell config file.
 
 ## Uninstallation
 
-If you need to remove uv from your system, just remove the `uv` and `uvx` binaries:
+If you need to remove uv from your system, follow these steps:
+
+1.  Clean up stored data (optional):
+
+    ```console
+    $ uv cache clean
+    $ rm -r "$(uv python dir)"
+    $ rm -r "$(uv tool dir)"
+    ```
+
+    !!! tip
+
+        Before removing the binaries, you may want to remove any data that uv has stored.
+
+2.  Remove the uv and uvx binaries:
 
     === "macOS and Linux"
 
@@ -205,16 +219,6 @@ If you need to remove uv from your system, just remove the `uv` and `uvx` binari
         $ rm $HOME\.local\bin\uvx.exe
         ```
 
-!!! tip
-
-    You may want to remove data that uv has stored before removing the binaries:
-
-    ```console
-    $ uv cache clean
-    $ rm -r "$(uv python dir)"
-    $ rm -r "$(uv tool dir)"
-    ```
-
     !!! note
 
         Prior to 0.5.0, uv was installed into `~/.cargo/bin`. The binaries can be removed from there to