Include some headers for brushbsp branch files (#325)

* include <vector> for std::vector definition

* include <algorithm> for std::clamp definition

include/common/fs.hh

@@ -23,6 +23,7 @@
 
 #include <filesystem>
 #include <optional>
+#include <vector>
 
 namespace fs
 {

include/common/mathlib.hh

@@ -27,6 +27,7 @@
 #include <array>
 #include <utility>
 #include <string>
+#include <algorithm>
 
 using std::max, std::min, std::clamp;
 
@@ -103,4 +104,4 @@ template<typename T, typename F>
 constexpr T mix(const T &a, const T &b, F frac)
 {
     return (a * (static_cast<F>(1.0) - frac)) + (b * frac);
-}
+}