[Docs] Update network diagram into mermaid diagram syntax. (#446)

docs/network diagram.md

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+```mermaid
+flowchart LR
+    %% Diagram arranged specifically so output generates no terrible crossing lines.
+    %% AP Server
+    AS{Archipelago Server}
+
+    %% CommonClient.py
+    CC[CommonClient.py]
+    AS <-- WebSockets --> CC
+
+    %% ChecksFinder
+    subgraph ChecksFinder
+        CFC[ChecksFinderClient]
+        CF[ChecksFinder]
+        CFC <--> CF
+    end
+    CC <-- Integrated --> CFC
+
+    %% A Link to the Past
+    subgraph A Link to the Past
+        LTTP[SNES]
+    end
+    SNI <-- Various, depending on SNES device --> LTTP
+
+    %% Final Fantasy
+    subgraph Final Fantasy 1
+        FF1[FF1Client]
+        FFLUA[Lua Connector]
+        BZFF[BizHawk with Final Fantasy Loaded]
+        FF1 <-- LuaSockets --> FFLUA
+        FFLUA <--> BZFF
+    end
+    CC <-- Integrated --> FF1
+
+    %% Ocarina of Time
+    subgraph Ocarina of Time
+        OC[OoTClient] 
+        LC[Lua Connector]
+        OCB[BizHawk with Ocarina of Time Loaded]
+        OC <-- LuaSockets --> LC
+        LC <--> OCB
+    end
+    CC <-- Integrated --> OC
+
+    %% SNI Connectors
+    SC[SNIClient]
+    SNI["Super Nintendo Interface (SNI)"]
+    CC <-- Integrated --> SC
+    SC <-- WebSockets --> SNI
+
+    %% Super Metroid
+    subgraph Super Metroid
+        SM[SNES]
+    end
+    SNI <-- Various, depending on SNES device --> SM
+
+    %% Super Metroid/A Link to the Past Combo Randomizer
+    subgraph "SMZ3"
+        SMZ[SNES]
+    end
+    SNI <-- Various, depending on SNES device --> SMZ
+
+    %% Native Clients or Games
+    %% Games or clients which compile to native or which the client is integrated in the game.
+    subgraph "Native"
+        APCLIENTPP[Game using apclientpp Client Library]
+        APCPP[Game using Apcpp Client Library]
+        subgraph Secret of Evermore
+            SOE[ap-soeclient]
+        end
+        SM64[Super Mario 64 Ex]
+        V6[VVVVVV]
+        MT[Meritous]
+
+        APCLIENTPP <--> SOE
+        APCLIENTPP <--> MT
+        APCPP <--> SM64
+        APCPP <--> V6
+    end
+    SOE <--> SNI <-- Various, depending on SNES device --> SOESNES
+    AS <-- WebSockets --> APCLIENTPP
+    AS <-- WebSockets --> APCPP
+
+    %% Java Based Games
+    subgraph Java
+        JM[Mod with Archipelago.MultiClient.Java]
+        STS[Slay the Spire]
+        JM <-- Mod the Spire --> STS
+        subgraph Minecraft
+            MCS[Minecraft Forge Server]
+            JMC[Any Java Minecraft Clients]
+            MCS <-- TCP --> JMC
+        end
+        JM <-- Forge Mod Loader --> MCS
+    end
+    AS <-- WebSockets --> JM
+
+    %% .NET Based Games
+    subgraph .NET
+        NM[Mod with Archipelago.MultiClient.Net]
+        subgraph FNA/XNA
+            TS[Timespinner]
+            RL[Rogue Legacy]
+        end
+        NM <-- TsRandomizer --> TS
+        NM <-- RogueLegacyRandomizer --> RL
+        subgraph Unity
+            ROR[Risk of Rain 2]
+            SN[Subnautica]
+            HK[Hollow Knight]
+            R[Raft]
+        end
+        NM <-- BepInEx --> ROR
+        NM <-- "QModLoader (BepInEx)" --> SN
+        NM <-- HK Modding API --> HK
+        NM <--> R
+    end
+    AS <-- WebSockets --> NM
+
+    %% Archipelago WebHost
+    subgraph "WebHost (archipelago.gg)"
+        WHNOTE(["Configurable (waitress, gunicorn, flask)"])
+        AH[AutoHoster] 
+        PDB[(PonyORM DB)]
+        WH[WebHost]
+        FWC[Flask WebContent]
+        AG[AutoGenerator]
+
+        AH <-- SQL --> PDB
+        WH -- Subprocesses --> AH
+        FWC <-- SQL --> PDB
+        WH --> FWC
+        AG -- Deposit Generated Worlds --> PDB
+        PDB -- Provide Generation Instructions --> AG
+        WH -- Subprocesses --> AG
+    end
+    AH -- Subprocesses --> AS
+
+    %% Special subgraph for SoE for its SNES connection
+    subgraph Secret of Evermore
+        SOESNES[SNES]
+    end
+
+    %% Factorio
+    subgraph Factorio
+        FC[FactorioClient] <-- RCON --> FS[Factorio Server]
+        FS <-- UDP --> FG[Factorio Games]
+        FMOD[Factorio Mod Generated by AP] 
+        FMAPI[Factorio Modding API]
+        FMAPI <--> FS
+        FMAPI <--> FG
+        FMOD <--> FMAPI
+    end
+    CC <-- Integrated --> FC
+```