misc: organize more of examples into subdirs as compose projects (#3608)

examples/modrinth/bmc4/compose.yml

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+services:
+  mc:
+    image: itzg/minecraft-server
+    environment:
+      EULA: true
+      MODPACK_PLATFORM: MODRINTH
+      # NOTE: v36 doesn't startup correctly
+      MODRINTH_MODPACK: https://modrinth.com/modpack/better-mc-forge-bmc4/version/v34.5
+      MODRINTH_OVERRIDES_EXCLUSIONS: |
+        config/paxi/datapacks/BE_default_endgen_fix*
+      MODRINTH_FORCE_SYNCHRONIZE: true
+      MEMORY: 4G
+    ports:
+      - "25565:25565"
+    volumes:
+      - mc-data:/data
+      # or use a host directory binding
+#      - ./data:/data
+volumes:
+  mc-data:

examples/modrinth/modrinth-modpack/compose.yml

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+services:
+  mc:
+    image: itzg/minecraft-server
+    tty: true
+    stdin_open: true
+    ports:
+      - "25565:25565"
+    environment:
+      EULA: "TRUE"
+      MODPACK_PLATFORM: MODRINTH
+      MODRINTH_MODPACK: https://modrinth.com/modpack/cobblemon-fabric/version/1.3.2
+      # or for auto-upgrading to latest
+      # MODRINTH_MODPACK: https://modrinth.com/modpack/cobblemon-fabric
+      # or just cobblemon-fabric or 5FFgwNNP
+      # and could replace version URL with
+      # MODRINTH_VERSION: nvrqJg44
+      # MODRINTH_VERSION: 1.3.2
+      # MODRINTH_VERSION: "Cobblemon [Fabric] 1.3.2"
+    volumes:
+      # attach the relative directory 'data' to the container's /data path
+      - ./data:/data

examples/modrinth/modrinth-paper/compose.yml

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+services:
+  mc:
+    image: itzg/minecraft-server
+    environment:
+      EULA: "true"
+      TYPE: PAPER
+      VERSION: 1.19.3
+      MODRINTH_PROJECTS: "coreprotect"
+      MODRINTH_ALLOWED_VERSION_TYPE: "release"
+    volumes:
+      - ./data:/data

examples/modrinth/modrinth-projects/compose.yml

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+services:
+  mc:
+    image: itzg/minecraft-server
+    tty: true
+    stdin_open: true
+    ports:
+      - "25565:25565"
+    environment:
+      EULA: "TRUE"
+      TYPE: FABRIC
+      MODRINTH_PROJECTS: fallingtree
+    volumes:
+      - data:/data
+
+volumes:
+  data: {}