Added mcscript language

Author: legopitstop

snippets/mcscript/basics/hello-world.md

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+---
+title: Hello, World!
+description: Prints Hello, World! to chat.
+author: Legopitstop
+tags: chat,hello-world
+---
+
+```mcscript
+/say Hello, World!
+```

snippets/mcscript/icon.svg

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+---
+title: Block
+description: Performs a raycast for 10 blocks, checking for air and placing a stone block when it hits white wool.
+author: legopitstop
+tags: raycast,block
+---
+
+```mcscript
+raycast(10,"air",block "white_wool") {
+    /setblock ~ ~ ~ stone
+}
+```

snippets/mcscript/raycast/block.md

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+---
+title: Entity
+description: Performs a raycast for 10 blocks, checking for air and placing a stone block when it hits an armor stand.
+author: Legopitstop
+tags: raycast,entity
+---
+
+```mcscript
+raycast(10,"air",entity @e[type=armor_stand]) {
+    /setblock ~ ~ ~ stone
+}
+```