Missing mime types for some extensions

[qarmin]

Below is list of 90 most popular extensions on my OS, that doesn't have any mime type assigned
some like qml are easy to assign, unlike generic extension file

a - file created by compilers
o - file created by compiles
pyc - compiled python
gd - Godot Engine script file
qml - QT language
ui - interface file(Glade/Cambalache etc.)

28636 - ko
27767 - d
25827 - mo
16772 - final
15620 - file
11143 - o
9470 - pyc
6494 - idx
3848 - cache
3448 - 0
3267 - timestamp
3236 - import
2668 - gd
2661 - qm
2577 - qml
2499 - cache-7
2393 - md5sums
2287 - rmeta
2109 - docbook
1870 - md5
1858 - rlib
1844 - a
1823 - len
1660 - tscn
1590 - g2d
1587 - desktop
1524 - stex
1475 - desc
1398 - fastresume
1369 - vim
1318 - sqlite
1311 - sample
1291 - page
1243 - ui
1232 - 1
1138 - pyi
1108 - triggers
1102 - rb
1064 - shlibs
954 - qmlc
947 - dirtree
897 - nls
859 - lng
778 - po
772 - jsonlz4
673 - spec
652 - symbols
634 - info
624 - tres
617 - service
578 - 2
575 - 3
533 - postinst
483 - cdb
483 - bik
477 - hdb
465 - tmpl
464 - postrm
447 - g16
445 - properties
380 - prerm
379 - done
370 - hyb
362 - code
358 - 5
354 - cocci
310 - cache-6
293 - 6
284 - rst
265 - _
258 - old
258 - tablet
255 - whs
254 - mpi
251 - preinst
249 - 26
248 - at
247 - g17
244 - mtl
236 - fw
236 - mmg
234 - conffiles
228 - storage
228 - Debian
218 - 4
211 - ejs
209 - out
209 - pod
205 - pack
200 - fon

[qarmin]

Code used to find such extensions

pub fn mime_check() {
    let allowed_extensions = vec![];
    let checked_dir = vec!["/home/", "/mnt"];

    let collected_files = collect_files(checked_dir, allowed_extensions);

    let collected_extensions: Vec<_> = collected_files
        .into_iter()
        .filter_map(|path| {
            let path = Path::new(&path);
            if let Some(extension) = path.extension() {
                let extension = extension.to_string_lossy().to_string();
                let mime_g = mime_guess::from_ext(extension.as_str());
                let mime_number = mime_g.iter().count();
                if extension == "a" {
                    println!("{:?}", path);
                }
                if mime_number == 0 {
                    return Some(extension);
                }
            }
            None
        })
        .collect();
    let mut btree: HashMap<String, u32> = Default::default();
    for i in collected_extensions {
        btree.entry(i.clone()).or_insert(0);
        *btree.get_mut(&i).unwrap() += 1;
    }

    let mut new_vec = Vec::new();
    for i in btree {
        new_vec.push(i);
    }
    new_vec.sort_by(|(_ext, number), (_ext2, number2)| {
        return if number < number2 {
            Ordering::Greater
        } else {
            Ordering::Less
        };
    });

    for (ext, number) in new_vec {
        println!("{} - {}", number, ext);
    }
}