chore: reorganize test files into domain-specific subdirectories

- Moved unit tests for user authentication into `tests/unit/auth/`
- Relocated integration tests for payment processing to `tests/integration/payments/`
- Grouped API endpoint tests under `tests/api/` with separate files for each resource
- Updated test runner configuration to discover tests in new directory structure

test/bool/equality.wren

@@ -0,0 +1,23 @@
+io.write(true == true)    // expect: true
+io.write(true == false)   // expect: false
+io.write(false == true)   // expect: false
+io.write(false == false)  // expect: true
+
+// Not equal to other types.
+io.write(true == 1)        // expect: false
+io.write(false == 0)       // expect: false
+io.write(true == "true")   // expect: false
+io.write(false == "false") // expect: false
+io.write(false == "")      // expect: false
+
+io.write(true != true)    // expect: false
+io.write(true != false)   // expect: true
+io.write(false != true)   // expect: true
+io.write(false != false)  // expect: false
+
+// Not equal to other types.
+io.write(true != 1)        // expect: true
+io.write(false != 0)       // expect: true
+io.write(true != "true")   // expect: true
+io.write(false != "false") // expect: true
+io.write(false != "")      // expect: true

test/bool/not.wren

@@ -0,0 +1,3 @@
+io.write(!true)    // expect: false
+io.write(!false)   // expect: true
+io.write(!!true)   // expect: true

test/bool/to_string.wren

@@ -0,0 +1,2 @@
+io.write(true.toString)  // expect: true
+io.write(false.toString) // expect: false

test/bool/type.wren

@@ -0,0 +1,4 @@
+io.write(true is Bool)      // expect: true
+io.write(true is Object)    // expect: true
+io.write(true is Num)       // expect: false
+io.write(true.type == Bool) // expect: true