feat: add flush tlb after return from switch

See merge request scuccs-cst-sra-group/loos!13

feat: adjust mappages and exec

See merge request scuccs-cst-sra-group/loos!12

feat: devel to main merge

See merge request scuccs-cst-sra-group/loos!11

feat: finish the preparation for merging with main

See merge request scuccs-cst-sra-group/loos!10

fix: devel fix compile errors

See merge request scuccs-cst-sra-group/loos!9

chores: reconstruct build system

See merge request scuccs-cst-sra-group/loos!8

chores: Main fix compiler message

See merge request scuccs-cst-sra-group/loos!5

chores: clean the dir to match specs; reconstruct build system

See merge request scuccs-cst-sra-group/loos!4

chores: update Makefile, scripts/loongarch64.mk, scripts/main.mk and tools/Makefile to add flexibility to project build system; rm kernel.bin, 1

test only

See merge request scuccs-cst-sra-group/loos!2

 Conflicts:
   Makefile
   src/core/user.c
   src/driver/disk.c