Refactor everything

We now hijack existing system functions to integrate with `WinMgr`,
instead of `Spawn`ing our own `SaphirTask`.

Also, you can now use `Saphir(Bool)` to toggle enable/disable the
features.

There is a global var `saphir` which values are set by `Defaults.HC` for
colors and other behaviors; these values can be changed at any time.

Saphir/Misc.HC

@@ -0,0 +1,53 @@
+#define FN_MAXNUM 32
+
+class FunctionIndex {
+    U64 addr;
+    U64 prologue;
+} fn_index[FN_MAXNUM];
+MemSet(fn_index, 0, sizeof(FunctionIndex));
+
+I64 fn_restore(U32 from)
+{
+    if (!from) {
+        return -1;
+    }
+
+    I64 i;
+    for (i = 0; i < FN_MAXNUM; i++) {
+        if (fn_index[i].addr == from) {
+            MemCpy(fn_index[i].addr, &fn_index[i].prologue, 8);
+            fn_index[i].addr = fn_index[i].prologue = 0;
+            return 0;
+        }
+    }
+    return -1;
+}
+
+I64 fn_patch(U32 from, U32 to, Bool patch = TRUE)
+{
+    if (!from || !to) {
+        return -1;
+    }
+    if (!patch) {
+        return fn_restore(from);
+    }
+
+    I64 i = 0;
+    while (i < FN_MAXNUM && fn_index[i].addr) {
+        if (fn_index[i].addr == from) {
+            // Function already patched
+            return -1;
+        }
+        ++i;
+    }
+    if (i >= FN_MAXNUM) {
+        // Maximum entires reached
+        return -1;
+    }
+
+    fn_index[i].addr = from;
+    MemCpy(&fn_index[i].prologue, from, 8);
+    *(from(U8*)) = 0xE9;
+    *((from + 1)(I32*)) = to - from - 5;
+    return 0;
+}