Release 0.6.0 - Core Systems Formalization

• Core Systems Formalization: Major refactoring and formalization of kernel core systems to improve stability and portability across architectures.
• Integrated IPC Subsystem: Full integration of the Capability-First IPC subsystem, enabling secure communication between kernel services and future userspace tasks.
• Enhanced Timer & Scheduling: Improved timer initialization and centisecond tracking for more accurate process scheduling and system time management.
• Kernel Metrics & Observability: Added swap usage tracking and updated the btop shell command to provide real-time memory and swap statistics.
• Expanded SageLang Bindings: Further exposed kernel primitives to SageLang, allowing more of the system to be written in idiomatic Sage code.
• Architectural Parity: Verified and synchronized "virt" builds for x86_64, AArch64, and RISC-V 64.