Begin implementing a repl in gst

libs/repl.gst

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+(namespace-set! "gst.repl")
+
+"Hold all compile time evaluators"
+(export! "evaluators" {})
+
+"Read a line"
+(export! "readline" (fn []
+    (: b (buffer))
+    (read stdin 1 b)
+    (while (not (= (get "\n" 0) (get b (- (length b) 1))))
+        (read stdin 1 b)
+    )
+    (string b)
+))
+
+"Create a parser"
+(export! "p" (parser))
+
+(while 1
+    (: line (readline))
+    (print "Read line: " line)
+)