doc: add GO TO page

Author: boriel

docs/goto.md

@@ -0,0 +1,34 @@
+#GO TO
+
+
+##Syntax
+```
+GO TO <label>
+GOTO <label>
+```
+Continues (jumps) the execution at the given label or line number.
+
+This sentence exists just for compatibility with legacy BASIC
+dialects. You should use [DO...LOOP](do.md), [FOR](for.md), [SUB](sub.md)
+or [FUNCTION](function.md) instead.
+
+You can't GOTO into a function or sub.
+
+### Example with GO TO
+
+```
+10 GOTO 30
+20 END
+30 PRINT "This is executed before END"
+40 GOTO 20
+```
+
+This will `This is executed before END` and then jump into
+line 20, finishing the program.
+
+
+##Remarks
+* This statement is Sinclair BASIC compatible.
+
+##See also
+* [GO SUB](gosub.md)