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.

Run.HC

@@ -1,3 +1,2 @@
-Adam("StrPrint(Fs->cur_dir, \"/\");\n");
-Adam("Fs->cur_dv = Let2Drv('T');\n");
-AdamFile("Load");
+Adam("#include \"M:/Load\";\n");
+XTalkWait(Fs, "Saphir;\n");