added pre version of a wiki

wiki/users/symbols.md

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+# Symbols replacement list
+In sheets or journals, you can use these tags to use symbols :
+```
+Dice symbols : (op) (su) (ex) (st) (skill) (ring)
+Rings : (earth) (water) (fire) (air) (void)
+Tech: (kiho) (maho) (ninjutsu) (ritual) (shuji) (invocation) (kata) (prereq) (inversion) (mantra)
+Clans: (imperial) (crab) (crane) (dragon) (lion) (mantis) (phoenix) (scorpion) (tortoise) (unicorn) (ronin)
+Others : (courtier) (bushi) (shugenja)
+```
+
+Result :
+
+![](img/symbols.png)