feat: Implement spectool & specview; refactor coding style; update docs

This commit introduces new tools for spectrogram manipulation and visualization, establishes a consistent coding style, and updates project documentation.

Key changes include:

- **Spectrogram Tools:

  - : A command-line utility for analyzing WAV/MP3 files into custom  spectrogram format and playing back these spectrograms via the synth engine.

  - : A command-line tool for visualizing  spectrogram files as ASCII art in the console.

- **Coding Style Enforcement:

  - Added a  configuration file enforcing LLVM-based style with 2-space indentation, no tabs, and an 80-column line limit.

  - Renamed all C++ source files from  to  for project consistency.

  - Applied automatic formatting using
exit across the entire codebase.

- **Documentation & Workflow:

  - Created  to define a commit policy requiring tests to pass before committing.

  - Updated  with instructions for building and using  and , and referenced .

  - Updated  and  to reflect the new tools, audio architecture decisions (real-time additive synthesis, double-buffering for dynamic updates, WAV/MP3 support), coding style, and development workflow.

- **Build System:

  - Modified  to:

    - Include new targets for  and  under the  option.

    - Update source file extensions to .

    - Add a new end-to-end test for  to the  suite.

1 files changed, 30 insertions, 0 deletions

diff --git a/src/platform.cc b/src/platform.cc
new file mode 100644
index 0000000..bfb566c
--- /dev/null
+++ b/src/platform.cc
@@ -0,0 +1,30 @@
+#include "platform.h"
+#include <GLFW/glfw3.h>
+
+static GLFWwindow *window = nullptr;
+
+void platform_init() {
+  glfwInit();
+  window = glfwCreateWindow(1280, 720, "demo64k", nullptr, nullptr);
+}
+
+void platform_shutdown() {
+  glfwDestroyWindow(window);
+  glfwTerminate();
+}
+
+void platform_poll() {
+  glfwPollEvents();
+}
+
+bool platform_should_close() {
+  return glfwWindowShouldClose(window);
+}
+
+GLFWwindow *platform_get_window() {
+  return window;
+}
+
+double platform_get_time() {
+  return glfwGetTime();
+}