update: add mermaid diagrams to README (#12)

* update: add mermaid diagrams to README

Signed-off-by: Milos Gajdos <[email protected]>

---------

Signed-off-by: Milos Gajdos <[email protected]>

Author: milosgajdos

README.md

@@ -11,6 +11,80 @@ It uses [NATS jetstream](https://docs.nats.io/nats-concepts/jetstream) for messa
 > This project was built purely for educational purposes and thus is likely ridden with bugs, inefficiencies, etc.
 > You should consider this project as highly experimental.
 
+## Bot Conversation Flow
+
+```mermaid
+sequenceDiagram
+    participant GoTTS as TTS
+    participant GoLLM as LLM
+    participant Gobot
+    participant Rustbot
+    participant RustLLM as LLM
+    participant RustTTS as TTS
+    Gobot->>+Rustbot: Hi Rustbot!
+    Rustbot->>RustLLM: Hi Rustbot!
+    RustLLM->>RustTTS: Hi Gobot!
+    RustLLM->>Rustbot: Hi Gobot!
+    Rustbot->>-Gobot: Hi Gobot!
+    activate Gobot
+    Gobot->>GoLLM: Hi Gobot!
+    GoLLM->>GoTTS: Teach me about Rust!
+    GoLLM->>Gobot: Teach me about Rust!
+    Gobot->>-Rustbot: Teach me about Rust!
+```
+
+## Architecture
+
+Zoomed in view on the high-level architecture:
+
+```mermaid
+flowchart TB
+    subgraph " "
+        playht(PlayHT API)
+        ollama(Ollama)
+    end
+    bot <-->ollama
+    bot <-->playht
+    bot <--> NATS[[NATS JetStream]]
+```
+
+## Tasks, Goroutines, Channels
+
+> [!NOTE]
+> Mermaid does not have proper support for controlling layout or even basic graph legends
+> There are some terrible workarounds, so I've opted not to use them in this README, hence
+> the diagram might feel a bit unwieldy
+
+```mermaid
+flowchart TB
+    ollama{Ollama}
+    playht{PlayHT}
+    llm((llm))
+    tts((tts))
+    jetWriter((jetWriter))
+    jetReader((jetReader))
+    ttsChunks(ttsChunks)
+    jetChunks(jetChunks)
+    prompts(prompts)
+    ttsDone(ttsDone)
+    subgraph NATS JetStream
+        Go(go)
+        Rust(rust)
+    end
+    Go-->jetReader
+    jetWriter-->Rust
+    jetReader-->prompts
+    prompts-->llm
+    llm-->ollama
+    llm-->ttsChunks
+    llm-->jetChunks
+    jetChunks-->jetWriter
+    ttsChunks-->tts
+    tts-->playht
+    tts-->ttsDone
+    ttsDone-->jetWriter
+```
+
 # HOWTO
 
 There are a few prerequisites: