Rebase version scheme to 0.x.x

The major version 4 was inherited from the original solis_modbus fork
and doesn't reflect SolisConnect's own release history. Reset MAJOR to
0 (keeping MINOR/PATCH as-is: 4.1.5 -> 0.1.5). Tags/release for v4.1.5
are replaced with v0.1.5 as a follow-up to this merge.

This branch is intentionally not named patch/dev so the auto-release
workflow treats this as a no-op merge; the tag/release swap is done
manually afterward.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: fboundy

custom_components/solisconnect/manifest.json

@@ -14,5 +14,5 @@
   "requirements": [
     "pymodbus>=3.11.1"
   ],
-  "version": "4.1.5"
+  "version": "0.1.5"
 }