refactor: Re-organize and clean-up pallas-primitives (#523)

* Re-organize and clean-up pallas-primitives

  Namely:

  - Move _common_ (i.e. era-independent) types and structures up to the
    `lib` module; to be shared across all eras. If any of those deviate
    in a subsequent era, it is easy to bring them down and define new
    types from the point of divergence onward. This simplifies the scope
    of each era-specific module and make them slightly easier to
    navigate.

    Note that, each era module still re-export all of the common types
    that's relevant to that particular era. So technically, this
    reorganization doesn't really change anything for callers/users of
    the library.

  - Rename `Scripthash` to `ScriptHash`. Before this commit, both
    actually existed as `ScriptHash` was introduced with the Conway era.
    Yet, they refer to the same thing, so the duplication is simply
    confusing.

  - Rename `One` / `Two` constructors for `NetworkId` to `Testnet` and
    `Mainnet` respectively. Also defined idiomatic `From` & `TryFrom`
    implementation for conversion to and from `u8`. This is a lot let
    confusing!

  - Generalize `PlutusScript` with a constant generic, to avoid
    repetition for each plutus script generated for specific version.
    Note that a distinction is still _necessary_ if we want to provie
    out-of-the-box serialisers for Plutus scripts, which are serialised
    with a tag prefix depending on the language. All else apart, they
    are strictly similar types.

  - Rename `CostMdls` to `CostModels`. Because, common.

  - Rename `plutus_script` to `plutus_v1_script` in the Alonzo's witness
    set, for consistency with other eras.

* Fix ordering of ScriptHash variants.

  This is an odd one. See the note.

* Bump minicbor to v0.25.1

* Add aliases with deprecation warnings to various fields and types.

* revert renaming plutus_script to plutus_v1_script in Alonzo witness

  See https://github.com/txpipe/pallas/pull/523#discussion_r1807329742

pallas-applying/tests/alonzo.rs

@@ -480,7 +480,7 @@ mod alonzo_tests {
                 ),
                 (
                     // (tx hash, tx output index):
-                    // (d2f9764fa93ae5bcabbb65c7a2f97d1e31188064ae3d2ba1462114453928dd99, 0)    
+                    // (d2f9764fa93ae5bcabbb65c7a2f97d1e31188064ae3d2ba1462114453928dd99, 0)
                     String::from("01c81ffcbc08ff49965d74f90c391541ff1cc2b043ffe41c81d840be8729f2ae5ed49a1734823ba37fd09923f5f7d494ae0efa23dd98ce02da"),
                     Value::Coin(20292207),
                     None,
@@ -1152,9 +1152,7 @@ mod alonzo_tests {
         let cbor_bytes: Vec<u8> = cbor_to_bytes(include_str!("../../test_data/alonzo1.tx"));
         let mut mtx: MintedTx = minted_tx_from_cbor(&cbor_bytes);
         let mut tx_body: TransactionBody = (*mtx.transaction_body).clone();
-        // Note that NetworkId::One maps to 0 through
-        // crate::utils::get_network_id_value, which is not correct in mainnet.
-        tx_body.network_id = Some(NetworkId::One);
+        tx_body.network_id = Some(NetworkId::Testnet);
         let mut tx_buf: Vec<u8> = Vec::new();
         let _ = encode(tx_body, &mut tx_buf);
         mtx.transaction_body =