cmake : update semver handling to be consistent with ggml/llama.cpp

This commit modifies the semantic version handling to be consistent with
how llama.cpp and ggml handle semver.

This commit introdues a new example named test-cmake which is intended
to be used to test the cmake configuration and installation.

bindings/javascript/package-tmpl.json

@@ -1,6 +1,6 @@
 {
   "name": "whisper.cpp",
-  "version": "@PROJECT_VERSION@",
+  "version": "@WHISPER_VERSION@",
   "description": "Whisper speech recognition",
   "main": "whisper.js",
   "scripts": {

bindings/javascript/package.json

@@ -1,6 +1,6 @@
 {
   "name": "whisper.cpp",
-  "version": "1.9.2",
+  "version": "1.9.2-dev",
   "description": "Whisper speech recognition",
   "main": "whisper.js",
   "scripts": {