refactor: update joystick and keyboard modules for improved functionality

- Simplified joystick management by consolidating joystick handling into a single class structure.
- Enhanced keyboard module with new methods for key and scancode handling.
- Removed deprecated JoystickModule and related files to streamline the codebase.
- Updated build configurations to ensure compatibility with the latest SDL features.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/joystick_cpp.cpp

@@ -0,0 +1,72 @@
+#include "zeroerr/assert.h"
+#include "zeroerr/unittest.h"
+
+#include "joystick/Joystick.h"
+#include "joystick/Pad.h"
+#include "common/Exception.h"
+
+namespace {
+
+eve::joystick::Joystick* joystick() {
+    return eve::joystick::Joystick::create();
+}
+
+}  // namespace
+
+TEST_CASE("joystick.create") {
+    auto* joy = joystick();
+    REQUIRE(joy != nullptr);
+    CHECK(joy->getName() == "Joystick");
+    CHECK(joy->getJoystickCount() >= 0);
+}
+
+TEST_CASE("joystick.getJoystickOutOfRange") {
+    auto* joy = joystick();
+    REQUIRE(joy != nullptr);
+    CHECK(joy->getJoystick(-1) == nullptr);
+    CHECK(joy->getJoystick(joy->getJoystickCount()) == nullptr);
+    CHECK(joy->getJoystickFromID(-99999) == nullptr);
+}
+
+TEST_CASE("joystick.mappingRoundTrip") {
+    auto* joy = joystick();
+    REQUIRE(joy != nullptr);
+
+    // Empty is allowed; invalid non-empty should throw.
+    joy->loadGamepadMappings("");
+    std::string saved = joy->saveGamepadMappings();
+    // May be empty if no gamepads have been seen.
+    CHECK(saved.find("invalid") == std::string::npos);
+
+    bool threw = false;
+    try {
+        joy->loadGamepadMappings("not-a-valid-mapping-line");
+    } catch (const eve::Exception&) {
+        threw = true;
+    }
+    CHECK(threw);
+}
+
+TEST_CASE("joystick.connectedPadsQueryable") {
+    auto* joy = joystick();
+    REQUIRE(joy != nullptr);
+
+    int n = joy->getJoystickCount();
+    for (int i = 0; i < n; i++) {
+        auto* pad = joy->getJoystick(i);
+        REQUIRE(pad != nullptr);
+        CHECK(joy->getIndex(pad) == i);
+        CHECK(pad->getID() >= 0);
+        // Connected pads expose non-negative counts.
+        if (pad->isConnected()) {
+            CHECK(pad->getAxisCount() >= 0);
+            CHECK(pad->getButtonCount() >= 0);
+            CHECK(pad->getHatCount() >= 0);
+            CHECK(!pad->getGUID().empty());
+            (void)pad->isDown(0);
+            (void)pad->isGamepadDown("a");
+            (void)pad->getGamepadAxis("leftx");
+            (void)pad->getHat(0);
+        }
+    }
+}