feat: add GC

[myuon]

No description provided.

[myuon]

nogc

	Command being timed: "just check_if_stable --validate-address"
	User time (seconds): 15.07
	System time (seconds): 1.22
	Percent of CPU this job got: 117%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 0:13.85
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 871072
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 50
	Minor (reclaiming a frame) page faults: 737871
	Voluntary context switches: 30
	Involuntary context switches: 7047
	Swaps: 0
	File system inputs: 0
	File system outputs: 0
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0

gc

	Command being timed: "just check_if_stable --validate-address"
	User time (seconds): 18.49
	System time (seconds): 1.30
	Percent of CPU this job got: 113%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 0:17.42
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 935300
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 50
	Minor (reclaiming a frame) page faults: 790342
	Voluntary context switches: 45
	Involuntary context switches: 7559
	Swaps: 0
	File system inputs: 0
	File system outputs: 0
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0

gc performed 2 times (1.75sec/gc), gc/500,000allocs

[myuon]

Example

fun write_to(fd_n: i32, content: string) {
    let ciovec = make[ptr[byte]](8);
    set_ciovec(ciovec, content.data, content.length);

    let ptr_size = make[ptr[i32]](1);
    let err = _fd_write(fd_n, ciovec, ptr_size);
    if err != 0 {
        panic("[file_write] fd_write {}", err.to_string());
    }
}

fun repeat(n: i32, content: string): string {
    let builder = stringbuilder::new();
    for i in 0..n {
        builder.append(content);
    }

    return builder.to_string();
}

fun main() {
    let fd_n = file_open("new.out", 9, 1 << 6);

    for i in 0..1000000 {
        write_to(fd_n, repeat(100, i.to_string()));
        write_to(fd_n, "\n");
    }

    file_close(fd_n);
}