add crosshair codes example

examples/crosshair_codes/index.js

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+var {parseEvent, parseTicks} = require('@laihoe/demoparser2');
+
+
+const pathToDemo = "path/to/demo.dem";
+
+let gameEndTick = Math.max(...parseEvent(pathToDemo, "round_end").map(x => x.tick))
+let players = parseTicks(pathToDemo, ["crosshair_code"], [gameEndTick])
+
+console.log(players)

examples/crosshair_codes/main.py

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+from demoparser2 import DemoParser
+import glob
+
+
+parser = DemoParser("path/to/demo.dem")
+
+last_tick = parser.parse_event("round_end")["tick"].to_list()[-1]
+df = parser.parse_ticks(["crosshair_code"],ticks=[last_tick])
+print(df)