Move "clapper_src" dir to "src"

The "clapper_src" directory name was unusual. This was done to make it work as a widget for other apps. Now that this functionality got removed it can be named simply "src" as recommended by guidelines.

src/debug.js

@@ -0,0 +1,41 @@
+const { GLib } = imports.gi;
+const { Debug } = imports.extras.debug;
+const { Ink } = imports.extras.ink;
+
+const G_DEBUG_ENV = GLib.getenv('G_MESSAGES_DEBUG');
+
+const clapperDebugger = new Debug.Debugger('Clapper', {
+    name_printer: new Ink.Printer({
+        font: Ink.Font.BOLD,
+        color: Ink.Color.MAGENTA
+    }),
+    time_printer: new Ink.Printer({
+        color: Ink.Color.ORANGE
+    }),
+    high_precision: true,
+});
+clapperDebugger.enabled = (
+    clapperDebugger.enabled
+    || G_DEBUG_ENV != null
+    && G_DEBUG_ENV.includes('Clapper')
+);
+const clapperDebug = clapperDebugger.debug;
+
+function debug(msg, levelName)
+{
+    levelName = levelName || 'LEVEL_DEBUG';
+
+    if(msg.message) {
+        levelName = 'LEVEL_CRITICAL';
+        msg = msg.message;
+    }
+
+    if(levelName !== 'LEVEL_CRITICAL')
+        return clapperDebug(msg);
+
+    GLib.log_structured(
+        'Clapper', GLib.LogLevelFlags[levelName], {
+            MESSAGE: msg,
+            SYSLOG_IDENTIFIER: 'clapper'
+    });
+}