Add linting feature and update test configurations in pixi.toml

Introduces a new `lint` feature with `ruff` and `black` dependencies. Extends test setup with additional dependencies and tasks for building, testing, and installation. Cleans up `.gitignore` and removes unused entries from `pixi.lock`.

cmake/CMakePresets.json

@@ -90,6 +90,25 @@
       "cacheVariables": {
         "CMAKE_BUILD_TYPE": "RelWithDebInfo"
       }
+    },
+    {
+      "name": "win-test",
+      "inherits": [
+        "win-shared"
+      ],
+      "hidden": false,
+      "binaryDir": "${sourceDir}/../build/win-test",
+      "warnings": {
+        "dev": false
+      },
+      "environment": {
+        "PREFIX": "${sourceDir}/../.pixi/envs/tests",
+        "LIBRARY_PREFIX": "${sourceDir}/../.pixi/envs/tests/Library"
+      },
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Release",
+        "SCHEMA_VERSIONS": "2x3;4;4x3_add2"
+      }
     }
   ]
 }