docs about windows setup

_docs/aichatbot_sidecar.md

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+AI Chatbot Sidecar
+==================
+
+This is the first app that doesn't run as a part of our SoA API architecture. (Though it is written such that we 
+could port it.) This app is responsible for generating all the content that goes into our streaming AI-powered TV
+programs.
+
+### Windows Installation
+
+The application uses sqlite, which is tricky to install on Windows.
+
+1. Put together an sqlite build directory containing the sources and dll file. One is checked in under this monorepo 
+   in ./windows/sqlite at the time of this writing, though that may change in the future.
+
+2. Add environment variables for the sqlite build directory (see https://github.com/diesel-rs/diesel/issues/487)
+
+    * PATH (append the sqlite build directory to the end)
+    * SQLITE3_LIB_DIR (a new environment variable; set it to the sqllite build path)
+
+
+3. Build the `sqlite3.lib` file with the following:
+
+   ```
+   lib /def:sqlite3.def /out:sqlite3.lib /MACHINE:amd64 
+   ```
+   
+   This must be done in "Developer Command Prompt for VS 2022" (or similar), not `cmd` or `PowerShell`.
+
+4. Run the diesel_cli tool build  
+   ```
+   cargo install diesel_cli --no-default-features --features sqlite
+   ```
+
+   If it still complains about the `sqlite3.lib` file not being found, be sure to double check that `echo %PATH%` shows 
+   the updated PATH from the steps above.
+