feat(e_window): Implement message box functionality and auto-centering

Adds new `box_type` feature to enable message box modes (ok, yesno, textinput, etc.). Implements dynamic window sizing based on content and message box type, and adds logic for auto-centering the window when position arguments are omitted.

The e_window documentation (`README.md`) has been updated with the new message box types and examples.

The build script has been added to include a build timestamp.

A minor fix was applied to `e_ai_summarize` to use `first_text()` instead of `content_text_as_str()` for the chat response, which seems to be an update to an external API usage.

New files:
- `Makefile.toml`: Adds tasks to install `e_window` and `e_window_types` dependencies.
- `addendum/e_window/build.rs`: Adds a build script to embed a timestamp.

Author: dave horner

.github/workflows/release-plz.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@stable
       - name: Install speech-dispatcher development headers
-        run: sudo apt-get update && sudo apt-get install -y libspeechd-dev
+        run: sudo apt-get update && sudo apt-get install -y libspeechd-dev libx11-dev
       - name: Install ALSA development libraries
         run: sudo apt-get update && sudo apt-get install -y libasound2-dev  
       - name: Run release-plz