Support dynamic Boot Hart and improve multi-core console output

Created by: Alic3r3L1cwhk

This pull request introduces two major improvements: dynamic boot hart support for SMP systems and a fix for console output corruption in multi-core scenarios. The changes enable the kernel to correctly identify and initialize the boot hart regardless of its ID, supporting both SMP=2 and SMP=4 configurations, and add a lock to ensure SMP-safe console output. Additionally, more detailed debug logging is added to process/task management for easier tracing of process lifecycle events.

Dynamic boot hart support:

• Refactored the kernel entry and initialization flow to support any boot hart ID, not just hart 0. This includes splitting the entry into separate rust_main_boot and rust_main_secondary functions, adding a _start_secondary entry in entry.asm, and passing the boot hart ID through initialization routines. (os/src/main.rs, os/src/cpu/mod.rs, os/src/entry.asm) [1] [2] [3] [4]
• Added a BOOT_HART_ID static variable and updated the hart startup logic to skip the boot hart and correctly start secondary harts using the new entry point. (os/src/cpu/mod.rs, os/src/entry.asm) [1] [2] [3]
• Updated documentation and planning notes to describe the new dual-entry design and summarize test results for both SMP=2 and SMP=4. (plans/phase-f-dynamic-boot-hart.md)

Console output SMP safety:

• Added a spin::Mutex lock to the print() function in console.rs to prevent interleaved output and corruption when multiple harts print concurrently. (os/src/console.rs) [1] [2]

Debug logging improvements:

• Added detailed debug logs in process/task management to trace waitpid, exit, and wait queue events, aiding in debugging process lifecycle and synchronization issues. (os/src/syscall/process.rs, os/src/task/mod.rs) [1] [2] [3] [4] [5]

These changes together ensure robust multi-core boot and operation, and improve observability and correctness in SMP environments.