zero padding in pages

1. It can be assumed that no books can have pages more than 100K (a "lahk" or ten "myriads") pages

• A bible can go from 1200 pages up to 2000 pages
• "Mission Earth" by L. Ron. Hubbard is ~4000 pages
• World's longest shitpost novel "The Blah Story" is ~7300 pages
• An actual publish book "Marienbad My Love" by Mark Leach is ~10700 pages
• "The Story of the Vivian Girls" by Henry Darger is ~15150 pages

2. Therefore, pages should only be five digits long maximum
3. Page names should always be in decimal for consistencies sake

• Therefore octal, dozenal or hexadecimal systems are strictly forbidden

4. All page tags should use the page: namespace only
5. It is assumed that page 0 is used for the front cover
6. (It can be assumed that page -1 is used as a proxy for the whole book)