feat!: Replace PsbtUpdater and Builder with create_psbt method

**Remove `PsbtUpdater` & `Builder`**

These was no need for these to be separated. The builder pattern was
nice but not needed at this stage.

**Remove `DataProvider`**

Instead of creating a separate struct for passing in data for
inputs/outputs. We can just have the data within our inputs/outputs.

**Introduce `Input` and `Output` types**

The `Input` type is what is passed through all stages of tx-building.
From canonicalization, grouping/filtering, coin-selection and finally
used to create the psbt.

The `Output` type is used to describe a psbt output. It either is one
that we own (in which, we have the descriptor), or one we do not (in
which case, we just have a spk).

Author: evanlinjin

Cargo.toml

@@ -10,6 +10,7 @@ readme = "README.md"
 
 [dependencies]
 miniscript = { version = "12", default-features = false }
+bdk_coin_select = "0.4.0"
 
 [dev-dependencies]
 anyhow = "1"