Enable the semantic version mechanism for WAMR (#1374)

Use the semantic versioning (https://semver.org) to replace the current date
versioning system, which is more general and is requested by some developers,
e.g. issue #1357.

There are three parts in the new version string:
- major. Any incompatible modification on ABIs and APIs will lead to an increment
  in the value of major, which mainly includes: AOT calling conventions, AOT file
  format, wasm_export.h, wasm_c_api.h, and so on.
- minor. It represents new features, including MVP/POST-MVP features, libraries,
  WAMR private ones, and so one.
- patch. It represents patches.

The new version will start from 1.0.0. Update the help info and version showing for
iwasm and wamrc.

core/iwasm/common/wasm_runtime_common.c

@@ -31,6 +31,7 @@
 #include "../fast-jit/jit_compiler.h"
 #endif
 #include "../common/wasm_c_api_internal.h"
+#include "../../version.h"
 
 /**
  * For runtime build, BH_MALLOC/BH_FREE should be defined as
@@ -5055,3 +5056,11 @@ wasm_runtime_destroy_custom_sections(WASMCustomSection *section_list)
     }
 }
 #endif /* end of WASM_ENABLE_LOAD_CUSTOM_SECTION */
+
+void
+wasm_runtime_get_version(uint32_t *major, uint32_t *minor, uint32_t *patch)
+{
+    *major = WAMR_VERSION_MAJOR;
+    *minor = WAMR_VERSION_MINOR;
+    *patch = WAMR_VERSION_PATCH;
+}