Matthew Leach 87fe041ba0 procfs: implement /proc/<PID>/maps ...

Implement the `maps` file which shows a process's VMA entries. Example
output:

```
[root@moss-machine /]# cat /proc/1/maps
500000000000-500000117000 r-xp 0000000000                    /bin/bash
50000012b000-500000130000 r--p 000011b000                    /bin/bash
500000130000-50000013e000 rw-p 0000120000                    /bin/bash
700000000000-70000002b000 r-xp 0000000000                    /lib/ld-linux-aarch64.so.1
70000003e000-700000040000 r--p 000002e000                    /lib/ld-linux-aarch64.so.1
700000040000-700000042000 rw-p 0000030000                    /lib/ld-linux-aarch64.so.1
7fffff510000-7fffff585000 r-xp 0000000000                    /usr/lib/libncursesw.so.6
7fffff585000-7fffff59b000 ---p 0000075000                    /usr/lib/libncursesw.so.6
7fffff59b000-7fffff5a0000 r--p 000007b000                    /usr/lib/libncursesw.so.6
7fffff5a0000-7fffff5a1000 rw-p 0000080000                    /usr/lib/libncursesw.so.6
7fffff5b0000-7fffff760000 r-xp 0000000000                    /usr/lib/libc.so.6
7fffff760000-7fffff76d000 ---p 00001b0000                    /usr/lib/libc.so.6
7fffff76d000-7fffff770000 r--p 00001bd000                    /usr/lib/libc.so.6
7fffff770000-7fffff772000 rw-p 00001c0000                    /usr/lib/libc.so.6
7fffff772000-7fffff779000 rw-p 0000000000
7fffff780000-7fffff7d9000 r-xp 0000000000                    /usr/lib/libreadline.so.8
7fffff7d9000-7fffff7ed000 ---p 0000059000                    /usr/lib/libreadline.so.8
7fffff7ed000-7fffff7f0000 r--p 000005d000                    /usr/lib/libreadline.so.8
7fffff7f0000-7fffff7f6000 rw-p 0000060000                    /usr/lib/libreadline.so.8
7fffff7f6000-7fffff7fb000 rw-p 0000000000
7fffff800000-800000063000 rw-p 0000000000                    [stack]
```

2026-01-27 06:10:43 +00:00

..

src

procfs: implement /proc/<PID>/maps

2026-01-27 06:10:43 +00:00

Cargo.toml

working ext4

2026-01-02 17:01:02 -08:00