Implement native Windows KSwitcher with configurable hotkeys and clipboard history

src/platform.h

@@ -0,0 +1,51 @@
+#pragma once
+#include "core.h"
+#include <filesystem>
+#include <objbase.h>
+#include <span>
+#include <stdexcept>
+
+namespace ks
+{
+using Bytes = std::vector<unsigned char>;
+struct Format
+{
+    UINT id{};
+    std::wstring name;
+    Bytes data;
+};
+struct Clip
+{
+    std::vector<Format> formats;
+    std::wstring text() const;
+    size_t size() const;
+};
+std::vector<Layout> readLayouts();
+const Layout &physicalLayout();
+wchar_t physicalKey(DWORD scan, bool shift);
+HKL windowLayout(HWND);
+bool activateWindow(HWND);
+bool ownsClipboard(HWND);
+bool webViewDescendant(DWORD owner, DWORD host,
+                       const std::function<std::optional<std::pair<DWORD, std::wstring>>(DWORD)> &read);
+std::wstring processName(HWND);
+Clip readClipboard(HWND, size_t limit = 32 * 1024 * 1024);
+DWORD writeClipboard(HWND, const Clip &);
+Clip textClip(const std::wstring &);
+bool chord(WORD key, UINT modifiers = 0);
+bool needsSelectionDelay(HWND);
+bool selectPrevious(size_t count, const std::function<bool()> &valid);
+bool modifiersReleased();
+void releaseModifiers();
+std::filesystem::path dataDirectory();
+void atomicWrite(const std::filesystem::path &, const Bytes &);
+Bytes readFile(const std::filesystem::path &, size_t limit);
+Bytes protect(const Bytes &);
+Bytes unprotect(const Bytes &);
+void setAutostart(bool, bool elevated = false);
+std::wstring currentUserSid();
+void configureAutostart(int mode);
+std::wstring executable();
+std::wstring lastError(const std::wstring &context);
+void log(const std::wstring &message);
+} // namespace ks