Bump script for kcl crates (#5612)

* start of kcl-bumper

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* works!

Signed-off-by: Jess Frazelle <github@jessfraz.com>

* add readme

Signed-off-by: Jess Frazelle <github@jessfraz.com>

---------

Signed-off-by: Jess Frazelle <github@jessfraz.com>

rust/README.md

@@ -0,0 +1,23 @@
+# Rust Crates
+
+### Releasing
+
+1. Make sure your working directory is this directory.
+1. Bump the versions of the crates:
+    ```bash
+    just bump-kcl-crate-versions 
+    ```
+3. Commit the changes:
+    ```bash
+    git add .
+    git commit -m "Bump versions"
+    ```
+4. Push the changes and get your PR approved.
+5. Publish the crates:
+    ```bash
+    just publish-kcl {version}
+    ```
+    - This will publish the relevant crates and push a new tag with the prefix
+    `kcl-`. DO NOT SET THE PREFIX TO `kcl-` when you run the command. The `just`
+    command will do that for you.
+    - The tag will then trigger the release of kcl-python-bindings.