prepare homegrown and forked libraries for versioned use

[mayel]

1. PR upstream when possible/relevant
2. if upstream merges and releasing a new version, use that
3. otherwise rename the fork and release to hex.pm, use that

here are some examples:

• https://www.hex.pm/packages/arrows
• https://www.hex.pm/packages/untangle
• https://www.hex.pm/packages/exto
• https://www.hex.pm/packages/needle
• https://www.hex.pm/packages/needle_ulid
• https://www.hex.pm/packages/formula2
• https://www.hex.pm/packages/iconify_ex
• ecto_sparkles
• https://github.com/bonfire-networks/entrepot and https://github.com/bonfire-networks/entrepot_ecto
• https://github.com/bonfire-networks/ecto_shorts (see Several small additions/tweaks MikaAK/ecto_shorts#14 or switch to something else: Evaluate other as DB query and/or pagination libs #344)
• https://github.com/bonfire-networks/fetch_favicon -> https://www.hex.pm/packages/faviconic
• https://github.com/bonfire-networks/furlex -> https://www.hex.pm/packages/unfurl
• https://www.hex.pm/packages/emote
• https://github.com/bonfire-networks/ecto_materialized_path
• https://github.com/bonfire-networks/forecastr or replace with more modern library? https://github.com/spencerolson/weather
• https://github.com/bonfire-networks/boruta (two open PRs that need gardening)
• https://github.com/bonfire-networks/paginator (to be able to merge from upstream would need to switch from PageInfo struct with start_cursor end_cursor to Metadata with before after but that means having to translate that for GraphQL: https://relay.dev/graphql/connections.htm#sec-undefined.PageInfo.Introspection - or maybe not if we were to merge this PR relay style pagination duffelhq/paginator#133, and check other divergences too, but seems Paginator is being deprecated so may want to properly fork it or switch to something else? see Evaluate other as DB query and/or pagination libs #344)
• https://www.hex.pm/packages/ecto_sparkles
• https://github.com/izelnakri/paper_trail (PR merged, but need to find solution to unknown type Needle.ULID for field :item_id, see How to use custom Ecto type for item_id  izelnakri/paper_trail#235)
• https://github.com/bonfire-networks/http_signatures (see also https://akkoma.dev/AkkomaGang/http_signatures)
• https://github.com/bonfire-networks/linkify (see also https://akkoma.dev/AkkomaGang/linkify) (rename to LinkUp?)
• add animal avatar generator waseigo/identicon_svg#2