feat: Bochs VBE linear framebuffer support

[GloriousAlpaca]

I'm currently working on porting Doom to Hermit and needed a feature to directly write pixel data into the Bochs Graphics Adaptor as Hermit currently only has support for VGA in textmode.

The feature currently adds standard BGA preparation (Link to OSDev) with a hardcoded resolution (640x400), bpp (32) and a systemcall (sys_get_framebuffer) to receive the address of the framebuffer.
The systemcall falls back to 0 if there was a failure in initializing the framebuffer (e.g. if pci is missing, or the bga feature is not enabled).

I have currently only tested this feature with c programs on a mac using Qemu. The feature is also only available on the x86_64 architecture.

[github-actions]

Benchmark Results

Details

Benchmark	Current: 2792b90	Previous: 8b752b3	Performance Ratio
startup_benchmark Build Time	81.84 s	80.58 s	1.02 ❗
startup_benchmark File Size	0.80 MB	0.80 MB	1.00 ❗
Startup Time - 1 core	0.77 s (±0.03 s)	0.75 s (±0.02 s)	1.02
Startup Time - 2 cores	0.76 s (±0.02 s)	0.75 s (±0.02 s)	1.01
Startup Time - 4 cores	0.77 s (±0.02 s)	0.76 s (±0.03 s)	1.01
multithreaded_benchmark Build Time	84.29 s	83.77 s	1.01 ❗
multithreaded_benchmark File Size	0.89 MB	0.90 MB	1.00 ❗
Multithreaded Pi Efficiency - 2 Threads	89.96 % (±8.10 %)	88.91 % (±5.63 %)	1.01
Multithreaded Pi Efficiency - 4 Threads	44.70 % (±3.19 %)	43.58 % (±2.56 %)	1.03
Multithreaded Pi Efficiency - 8 Threads	25.99 % (±1.59 %)	25.21 % (±1.38 %)	1.03
micro_benchmarks Build Time	82.15 s	83.23 s	0.99 ❗
micro_benchmarks File Size	0.90 MB	0.90 MB	1.00 ❗
Scheduling time - 1 thread	67.27 ticks (±2.57 ticks)	66.41 ticks (±2.49 ticks)	1.01
Scheduling time - 2 threads	37.33 ticks (±4.37 ticks)	36.98 ticks (±4.38 ticks)	1.01
Micro - Time for syscall (getpid)	4.45 ticks (±0.64 ticks)	4.38 ticks (±0.61 ticks)	1.02
Memcpy speed - (built_in) block size 4096	82928.47 MByte/s (±57338.23 MByte/s)	80964.12 MByte/s (±56065.00 MByte/s)	1.02
Memcpy speed - (built_in) block size 1048576	30245.58 MByte/s (±24466.65 MByte/s)	30488.32 MByte/s (±24607.18 MByte/s)	0.99
Memcpy speed - (built_in) block size 16777216	26416.82 MByte/s (±21804.46 MByte/s)	26922.99 MByte/s (±22163.33 MByte/s)	0.98
Memset speed - (built_in) block size 4096	83366.97 MByte/s (±57623.13 MByte/s)	81292.09 MByte/s (±56295.77 MByte/s)	1.03
Memset speed - (built_in) block size 1048576	31006.80 MByte/s (±24904.24 MByte/s)	31212.89 MByte/s (±25032.24 MByte/s)	0.99
Memset speed - (built_in) block size 16777216	27160.92 MByte/s (±22269.44 MByte/s)	27704.28 MByte/s (±22658.95 MByte/s)	0.98
Memcpy speed - (rust) block size 4096	74141.85 MByte/s (±51714.37 MByte/s)	73359.02 MByte/s (±51215.91 MByte/s)	1.01
Memcpy speed - (rust) block size 1048576	30182.37 MByte/s (±24459.40 MByte/s)	30393.47 MByte/s (±24606.70 MByte/s)	0.99
Memcpy speed - (rust) block size 16777216	27171.49 MByte/s (±22455.29 MByte/s)	27849.43 MByte/s (±22986.75 MByte/s)	0.98
Memset speed - (rust) block size 4096	74363.14 MByte/s (±51844.32 MByte/s)	73359.02 MByte/s (±51215.91 MByte/s)	1.01
Memset speed - (rust) block size 1048576	30933.08 MByte/s (±24900.34 MByte/s)	31145.98 MByte/s (±25044.39 MByte/s)	0.99
Memset speed - (rust) block size 16777216	27931.67 MByte/s (±22920.89 MByte/s)	28625.01 MByte/s (±23459.41 MByte/s)	0.98
alloc_benchmarks Build Time	75.95 s	77.14 s	0.98 ❗
alloc_benchmarks File Size	0.88 MB	0.88 MB	1.00 ❗
Allocations - Allocation success	91.31 %	91.31 %	1
Allocations - Deallocation success	100.00 %	100.00 %	1
Allocations - Pre-fail Allocations	61.44 %	61.44 %	1
Allocations - Average Allocation time	4788.00 Ticks (±82.26 Ticks)	5021.61 Ticks (±76.52 Ticks)	0.95 ❗
Allocations - Average Allocation time (no fail)	5539.85 Ticks (±93.26 Ticks)	5797.34 Ticks (±78.21 Ticks)	0.96 ❗
Allocations - Average Deallocation time	1074.62 Ticks (±153.76 Ticks)	1468.37 Ticks (±182.04 Ticks)	0.73 ❗
mutex_benchmark Build Time	77.11 s	76.50 s	1.01 ❗
mutex_benchmark File Size	0.90 MB	0.90 MB	1.00 ❗
Mutex Stress Test Average Time per Iteration - 1 Threads	12.28 ns (±0.45 ns)	12.08 ns (±0.27 ns)	1.02
Mutex Stress Test Average Time per Iteration - 2 Threads	40.98 ns (±2.31 ns)	41.70 ns (±1.99 ns)	0.98

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