Create Diagnostics.md

docs/Diagnostics.md

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+## Operation Profiling
+
+To profile the interpreter's operations enable `d_m3EnableOpProfiling` in `m3_config.h`
+
+When a runtime is released or `m3_PrintProfilerInfo ()` is called, a table of the executed operations and 
+their instance counts will be printed to stderr.
+
+```
+     23199904  op_SetSlot_i32
+     12203917  op_i32_Add_ss
+      6682992  op_u32_GreaterThan_sr
+      2021555  op_u32_ShiftLeft_sr
+      1136577  op_u32_ShiftLeft_ss
+      1019725  op_CopySlot_32
+       775431  op_i32_Subtract_ss
+       703307  op_i32_Store_i32_rs
+       337656  op_i32_Multiply_rs
+       146383  op_u32_Or_rs
+        99168  op_u64_Or_rs
+        50311  op_u32_ShiftRight_rs
+        43319  op_u32_ShiftLeft_rs
+        21104  op_i64_Load_i64_s
+        17450  op_i32_LessThan_sr
+         7129  op_If_s
+         5574  op_i32_Wrap_i64_r
+         1630  op_f64_Load_f64_r
+         1116  op_u32_Divide_sr
+          903  op_i32_GreaterThan_ss
+          390  op_u64_And_rs
+          108  op_Select_f64_rss
+           77  op_u64_ShiftLeft_sr
+           64  op_Select_i32_ssr
+           11  op_f64_Store_f64_ss
+           10  op_MemGrow
+            8  op_f64_GreaterThan_sr
+            4  op_u64_LessThan_rs
+            1  op_u32_Xor_ss
+            1  op_i64_Subtract_ss
+```