Bolt-expressions

Fix
* DataSource._copy doesn't support subclasses. ([`21d1db3`](https://github.com/rx-modules/bolt-expressions/commit/21d1db3447061fa5eefcaf60aae8ac9b755e4d5e))

Fix
* Let dicts be used as filter keys in DataSource paths ([`f10cbdf`](https://github.com/rx-modules/bolt-expressions/commit/f10cbdfdc334b67d1303f920d9512271ced2a540))

Feature
* Api method to cast expressions to any nbt type ([`eb3d532`](https://github.com/rx-modules/bolt-expressions/commit/eb3d53227df26d48f8291f1f0137ccc12f75caba))

Fix
* Better nbt type handling ([`9f63995`](https://github.com/rx-modules/bolt-expressions/commit/9f63995b4fdfd38803da54260acd18bb09493c45))
* Scaling/casting between data sources doesn't work ([`5074414`](https://github.com/rx-modules/bolt-expressions/commit/50744149cf3a16cefce18e42d096ffc44196f1bc))

Feature
* Scale nbt data with multiplication/division ([`ebf9420`](https://github.com/rx-modules/bolt-expressions/commit/ebf942009d5696b57d695e05b3dfc2819f9029d3))
* Directly create score sources using the Scoreboard API ([`4d42c97`](https://github.com/rx-modules/bolt-expressions/commit/4d42c97990f872f107892cf6b2f27202343ceb28))
* Create multiple score sources at once ([`4eca574`](https://github.com/rx-modules/bolt-expressions/commit/4eca5743740799ec57def181559ff908d949e71c))

Fix
* Use `bolt` package instead of `mecha.contrib.bolt` in `api.py` ([`ace4b1a`](https://github.com/rx-modules/bolt-expressions/commit/ace4b1ae5f637f771e819e6bb83a32cd8a92866b))

Documentation
* Changes related to the new `bolt` package. ([`6ceac3b`](https://github.com/rx-modules/bolt-expressions/commit/6ceac3bc93a4e6949302eb96bb68ef60d8c2461b))
* Fix tutorial codeblocks not using mcfunction lang ([`aff3d90`](https://github.com/rx-modules/bolt-expressions/commit/aff3d905f87ccdd8a74467a38d8f925f550780af))

Feature
* Add expression node methods ([`97b5a44`](https://github.com/rx-modules/bolt-expressions/commit/97b5a44253370aeaef5d9c820e4ef93c4f4950c9))