fix: convert cf-kv and excalidraw-libraries from submodules to regular files

- Remove stale cloudflare-worker submodule entry from .gitmodules
- Remove .git dirs from cf-kv and excalidraw-libraries so Git tracks them as regular files
- Fixes 'No url found for submodule path cf-kv' CI error

excalidraw-libraries/libraries/cengizhanparlak/code-essentials.excalidrawlib

@@ -0,0 +1,135 @@
+{
+  "type": "excalidrawlib",
+  "version": 2,
+  "source": "https://excalidraw.com",
+  "libraryItems": [
+    {
+      "id": "Bi5IYJCZVsUtXXSWpl6GS",
+      "status": "published",
+      "elements": [
+        {
+          "type": "rectangle",
+          "version": 241,
+          "versionNonce": 1688763260,
+          "isDeleted": false,
+          "id": "3eJW8gsXvtDIqlbvPfDNR",
+          "fillStyle": "solid",
+          "strokeWidth": 1,
+          "strokeStyle": "solid",
+          "roughness": 1,
+          "opacity": 30,
+          "angle": 0,
+          "x": -23.552619971269564,
+          "y": 1626.733943922924,
+          "strokeColor": "#000000",
+          "backgroundColor": "#868e96",
+          "width": 1195.6900014622402,
+          "height": 722.1850620092732,
+          "seed": 1343948356,
+          "groupIds": [
+            "BstW35pIvTnBPoC1iYtET"
+          ],
+          "strokeSharpness": "sharp",
+          "boundElements": [],
+          "updated": 1658698590195,
+          "link": null,
+          "locked": false
+        },
+        {
+          "type": "rectangle",
+          "version": 222,
+          "versionNonce": 1959529028,
+          "isDeleted": false,
+          "id": "F0q1p2t19SjH3DFT2nFXw",
+          "fillStyle": "solid",
+          "strokeWidth": 1,
+          "strokeStyle": "solid",
+          "roughness": 1,
+          "opacity": 50,
+          "angle": 0,
+          "x": -21.41970464069374,
+          "y": 1628.334709053316,
+          "strokeColor": "#000000",
+          "backgroundColor": "#000000",
+          "width": 26.964624211667562,
+          "height": 721.8615319135084,
+          "seed": 397570044,
+          "groupIds": [
+            "BstW35pIvTnBPoC1iYtET"
+          ],
+          "strokeSharpness": "round",
+          "boundElements": [],
+          "updated": 1658698590195,
+          "link": null,
+          "locked": false
+        }
+      ],
+      "created": 1658698592467,
+      "name": "long code block"
+    },
+    {
+      "status": "published",
+      "elements": [
+        {
+          "id": "vPrOmJmv7ET2QBS7CT5b5",
+          "type": "rectangle",
+          "x": 161.37357152723462,
+          "y": 631.8509371120954,
+          "width": 1258.5465159804908,
+          "height": 136.84508526077863,
+          "angle": 0,
+          "strokeColor": "#000000",
+          "backgroundColor": "#868e96",
+          "fillStyle": "solid",
+          "strokeWidth": 1,
+          "strokeStyle": "solid",
+          "roughness": 1,
+          "opacity": 30,
+          "groupIds": [
+            "AUnkH112P4dwY_gayvOTP"
+          ],
+          "strokeSharpness": "round",
+          "seed": 1084702588,
+          "version": 105,
+          "versionNonce": 1755179332,
+          "isDeleted": false,
+          "boundElements": null,
+          "updated": 1658698465059,
+          "link": null,
+          "locked": false
+        },
+        {
+          "id": "udGP4tas1S6a0Sx4c34yR",
+          "type": "rectangle",
+          "x": 163.61861259548334,
+          "y": 633.5358532486305,
+          "width": 24.89998486778279,
+          "height": 136.4519170754495,
+          "angle": 0,
+          "strokeColor": "#000000",
+          "backgroundColor": "#000000",
+          "fillStyle": "solid",
+          "strokeWidth": 1,
+          "strokeStyle": "solid",
+          "roughness": 1,
+          "opacity": 50,
+          "groupIds": [
+            "AUnkH112P4dwY_gayvOTP"
+          ],
+          "strokeSharpness": "round",
+          "seed": 903151940,
+          "version": 82,
+          "versionNonce": 1736654076,
+          "isDeleted": false,
+          "boundElements": null,
+          "updated": 1658698465059,
+          "link": null,
+          "locked": false
+        }
+      ],
+      "id": "oYDD9VcDze1Gxpxg4QX13",
+      "created": 1658698503687,
+      "name": "short code block"
+    }
+  ]
+}