move everything to subfolder theories/

theories/base_logic/lib/sts.v

theories/base_logic/lib/viewshifts.v

theories/base_logic/lib/wsat.v

theories/base_logic/primitive.v

theories/base_logic/soundness.v

theories/base_logic/tactics.v

theories/base_logic/upred.v

theories/heap_lang/adequacy.v

theories/heap_lang/lang.v

theories/heap_lang/lib/assert.v

theories/heap_lang/lib/barrier/barrier.v

theories/heap_lang/lib/barrier/proof.v

theories/heap_lang/lib/barrier/protocol.v

theories/heap_lang/lib/barrier/specification.v

theories/heap_lang/lib/counter.v

theories/heap_lang/lib/lock.v

theories/heap_lang/lib/par.v

theories/heap_lang/lib/spawn.v

theories/heap_lang/lib/spin_lock.v

theories/heap_lang/lib/ticket_lock.v