Optimize the Chalk startup to cache the base config at compile time

There is currently a little delay when running e.g. `chalk help`, because chalk always performs various setup tasks, regardless of the user-specified command:

https://github.com/crashappsec/chalk/blob/175f32f001d90de02c3efa10d19467f08e98a1a7/src/chalk.nim#L13-L24

Does chalk want to always perform every setup task, or could it skip some of them when the command is e.g. `help`?

It's clear that `chalk help` is currently doing a lot of stuff:

```console
$ strace --summary-only --summary-columns=time-percent,calls,errors,name chalk help > /dev/null
% time calls errors syscall
------ --------- --------- ----------------
97.75 34980 read
1.00 350 lseek
0.49 106 mmap
0.45 66 munmap
0.05 15 1 rt_sigaction
0.04 6 readlink
0.04 57 getcwd
0.03 22 15 stat
0.02 5 rt_sigprocmask
0.02 11 3 ioctl
0.02 3 brk
0.02 9 lstat
0.02 13 readv
0.01 6 1 open
0.01 5 close
0.01 9 fstat
0.01 10 fcntl
0.00 6 getpid
0.00 2 writev
0.00 1 uname
0.00 1 getgid
0.00 1 getegid
0.00 1 execve
0.00 1 getuid
0.00 2 geteuid
0.00 1 getgroups
0.00 1 arch_prctl
0.00 1 set_tid_address
------ --------- --------- ----------------
100.00 35691 20 total
```

For example, `open`ing:

- `/usr/bin/docker`
- `/home/foo/.local/share/bash_completion/completions/chalk.bash`
- `/usr/local/ssl/openssl.cnf`

By the way, is this an expected number of syscalls? (I'm still new to chalk).

---

Chalk version: 175f32f001d90de02c3efa10d19467f08e98a1a7

Start by reading src/chalk.nim lines 13-24 and reproducing `chalk help` with `strace --summary-only`. Identify which setup tasks and external paths are accessed before help runs; done means unnecessary setup is skipped for this command while its expected output remains unchanged.

Written by the indexing model from the issue text.