Add initial implementation of grammar.lark

src/grammar.lark

@@ -0,0 +1,36 @@
+start: body footer
+
+body: params data
+params: detailed_params | simple_params
+detailed_params: INT INT INT INT [INT] info
+simple_params: INT INT INT INT
+info: "5002" INFO_BODY "6002"
+data: (info | "5000" | INT)+
+
+footer: "5003" footer_line+ "6003"
+footer_line: rate_line | stat_line | nr_line | log_line
+
+rate_line: modality rate
+rate: rate_prefix INT INT
+rate_prefix: "Freq Per:"
+
+stat_line: modality stat
+stat: stat_prefix INT INT INT INT
+stat_prefix: "Min Max Avg StdDiff:"
+
+nr_line: nr_prefix INT INT INT INT
+nr_prefix: "NrTrig NrMP NrArr AcqWin:"
+
+log_line: log_prefix INT
+log_prefix: "LogStartMDHTime:"
+ | "LogStopMDHTime:"
+ | "LogStartMPCUTime:"
+ | "LogStopMPCUTime:"
+
+modality: "ECG" | "PULS" | "RESP" | "EXT" | "EXT2"
+
+INFO_BODY: /[^\s]+.+?(?=\s*?6002)/
+
+%import common.INT
+%import common.WS
+%ignore WS