fix: do not clean non-cmd buttons on IN_SCORE hook.

fix: reset search nodes when receiving team info message.
fix: clear bot args on every call to bot client command.
add: drone build scenario.

.drone.jsonnet

@@ -0,0 +1,44 @@
+local mesonBuild (buildName, cxx, ld, mesonOptions) = {
+  kind: "pipeline",
+  type: "exec",
+  name: buildName,
+  steps: [
+    {
+      environment: {
+         CXX: cxx,
+         CXX_LD: ld
+      },
+      name: "setup",
+      commands: [
+        "meson setup build " + mesonOptions,
+      ]
+    },
+    {
+      name: "build",
+      commands: [
+        "ninja -C build",
+      ]
+    },
+    {
+      name: "upload",
+      commands: [
+        "upload-binary " + buildName
+      ]
+    }
+  ]
+};
+
+[
+  mesonBuild("linux-release-gcc", "gcc", "", ""),
+  mesonBuild("linux-release-clang", "clang", "lld", ""),
+  
+  mesonBuild("linux-release-intel", "/opt/intel/bin/icc", "", ""),
+  mesonBuild("linux-debug-gcc", "gcc", "", "--buildtype=debug"),
+  
+  mesonBuild("macos-release-clang", "", "", "--cross-file=/opt/meson/cross/darwin.ini"),
+  mesonBuild("macos-debug-clang", "", "", "--cross-file=/opt/meson/cross/darwin.ini --buildtype=debug"),
+  
+  mesonBuild("win32-release-msvc", "", "", "--cross-file=/opt/meson/cross/msvc.ini -Db_vscrt=mt"),
+  mesonBuild("win32-debug-msvc", "", "", "--cross-file=/opt/meson/cross/msvc.ini --buildtype=debug -Db_vscrt=mtd"),
+  mesonBuild("win32-release-mingw", "", "", "--cross-file=/opt/meson/cross/mingw.ini"),
+]