refactor: merge starry-core & starry-api into starry-kernel

[AsakuraMizu]

Prepare for next stage refactor

[Copilot]

Pull request overview

This PR performs a major refactoring by merging the starry-core and starry-api crates into a single starry-kernel crate. This consolidation simplifies the codebase architecture and prepares for the next stage of refactoring.

Changes:

• Merged starry-core and starry-api into starry-kernel
• Renamed vfs module to pseudofs for clarity
• Split task module into smaller submodules (futex, ops, resources, signal, stat, timer, user)
• Moved IRQ counter from time.rs to its actual usage location in proc.rs

Reviewed changes

Copilot reviewed 74 out of 108 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
kernel/Cargo.toml	Package renamed from starry-api to starry-kernel with updated dependencies
kernel/src/lib.rs	New root module for starry-kernel
kernel/src/config/*	Architecture-specific configurations moved here
kernel/src/task/*	Task module split into focused submodules
kernel/src/pseudofs/*	Renamed from vfs module, organizing virtual filesystem support
kernel/src/mm/*	Memory management module with I/O and loader separated
kernel/src/file/*	File operations reorganized with new net.rs, event.rs, epoll.rs
kernel/src/syscall/*	Syscall handlers updated with new import paths
Cargo.toml	Workspace updated to reference starry-kernel instead of starry-core/starry-api

Comments suppressed due to low confidence (1)

kernel/src/pseudofs/dev/memtrack.rs:15

• The import path crate::vfs::DeviceOps should be crate::pseudofs::DeviceOps to match the module rename from vfs to pseudofs in this refactor.

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