Add <algorithm> include for std::{min,max}

[madebr]

lib/file.cpp uses std::min, which is provided by the <algorithm> header.

This should fix the following errors (untested):

 D:\a\isle-portable\isle-portable\build\3rdparty\libweaver-src\lib\file.cpp(285): error C2589: '(': illegal token on right side of '::'
D:\a\isle-portable\isle-portable\build\3rdparty\libweaver-src\lib\file.cpp(285): error C2059: syntax error: ')'
D:\a\isle-portable\isle-portable\build\3rdparty\libweaver-src\lib\file.cpp(288): error C2589: '(': illegal token on right side of '::'
D:\a\isle-portable\isle-portable\build\3rdparty\libweaver-src\lib\file.cpp(288): error C2059: syntax error: ')'
D:\a\isle-portable\isle-portable\build\3rdparty\libweaver-src\lib\file.cpp(303): error C2589: '(': illegal token on right side of '::'
D:\a\isle-portable\isle-portable\build\3rdparty\libweaver-src\lib\file.cpp(303): error C2059: syntax error: ')'

See this ci run