add custom word lists

[KayleeWilliams]

Summary

• add custom word lists through wordLists and CLI --word-list flags
• add exact-word omissions through omit and CLI --omit flags
• update permutation counts to reflect unique generatable names, including overlapping custom lists
• remove GitHub sponsorship funding metadata

Validation

• bun test
• bun run check

Notes

• includes a minor changeset for the new API and CLI behavior