Removes Snowbridge parachain directory (#3186)

Removes the `bridges/snowbridge/parachain` directory and moves
everything up to under `snowbridge` directly. We are cleaning up our
local dev env after merging our crates into the polkadot-sdk.

---------

Co-authored-by: claravanstaden <Cats 4 life!>

bridges/snowbridge/primitives/beacon/src/lib.rs

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2023 Snowfork <hello@snowfork.com>
+#![cfg_attr(not(feature = "std"), no_std)]
+
+pub mod bits;
+pub mod bls;
+pub mod config;
+pub mod merkle_proof;
+pub mod receipt;
+pub mod ssz;
+pub mod types;
+pub mod updates;
+
+#[cfg(feature = "std")]
+mod serde_utils;
+
+pub use types::{
+	BeaconHeader, CompactBeaconState, CompactExecutionHeader, ExecutionHeaderState,
+	ExecutionPayloadHeader, FinalizedHeaderState, Fork, ForkData, ForkVersion, ForkVersions, Mode,
+	PublicKey, Signature, SigningData, SyncAggregate, SyncCommittee, SyncCommitteePrepared,
+	VersionedExecutionPayloadHeader,
+};
+pub use updates::{CheckpointUpdate, ExecutionHeaderUpdate, NextSyncCommitteeUpdate, Update};
+
+pub use bits::decompress_sync_committee_bits;
+pub use bls::{
+	fast_aggregate_verify, prepare_aggregate_pubkey, prepare_aggregate_pubkey_from_absent,
+	prepare_aggregate_signature, prepare_g1_pubkeys, AggregatePublicKey, AggregateSignature,
+	BlsError, PublicKeyPrepared, SignaturePrepared,
+};
+pub use merkle_proof::verify_merkle_branch;
+pub use receipt::verify_receipt_proof;