also interested

Apart from the obvious of converting the textures and models to source 2 format. Sounds like converting the vmf can have a few extra steps. This is what I could find : https://developer.valvesoftware.com/wiki/Half-Life:_Alyx_Workshop_Tools/Importing_Source_1_Maps . https://m.youtube.com/watch?v=NDr3IbRlA4I and https://m.youtube.com/watch?v=3CgoCSRIGqI if you want to convert the maps to objects.
For the programs I would definitely get comfortable with Blender and VTFEdit if you aren't already. I could have also sworn at one point source 2 had a way of converting source 1 models and textures really easily but I'd check the source dev wiki for that

First of all you need BSP decompiler, I found one as ' BSPSource', which decompile old bsp map files into `.vmf` files (which is valve map files), then you just need to open HLA hammer and import old map file into HLA game

However, there also would be need to port all old-format texture and old-format models, to make it work, and there is a more difficult process than just port map itself