- Embed XMRig executable (baked into buildbot image)

- Refactored CMake related to Tor/XMRig
- Move executables to `src/assets/exec`
- Embedding executables require passing definition to CMake, e.g:
  - `-DTOR=/path/to/tor`
  - `-DXMRIG=/path/to/xmrig`
- Allow solo mining for XMRig
- Redesign XMRig settings screen

src/assets_mining.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+    <qresource prefix="/">
+        <file>assets/exec/xmrig</file>
+    </qresource>
+</RCC>