chore: add cargo spellcheck configuration and custom topic specifc dictionary (#1841)

.config/lingua.dic

+90
+annualised/MS
+Apache-2.0/M
+api/SM
+API/SM
+APIs
+async
+BFT/M
+bitfield/MS
+blake2/MS
+blockchain/MS
+borked
+BTC/S
+CLI/MS
+config/MS
+crypto/MS
+customizable/B
+debian/M
+decodable/MS
+DOT/S
+ed25519
+enum/MS
+ERC-20
+ethereum/MS
+externality/MS
+extrinsic/MS
+extrinsics
+fedora/M
+GiB/S
+GPL/M
+GPLv3/M
+Handler/MS
+https
+inherent/MS
+initialize/RG
+instantiate/B
+intrinsic/MS
+intrinsics
+io
+js
+keccak256/M
+KSM/S
+kusama/S
+KYC/M
+merkle/MS
+misbehavior/SM
+misbehaviors
+MIT/M
+multivalidator/SM
+oneshot/MS
+others'
+parablock/MS
+parachain/MS
+parameterize/D
+polkadot/MS
+pov-block/MS
+PoV/MS
+promethius
+promethius'
+provisioner/MS
+redhat/M
+repo/MS
+RPC/MS
+runtime/MS
+rustc/MS
+sr25519
+struct/MS
+subsystem/MS
+subsystems'
+taskmanager/MS
+teleport/RG
+teleportation/SM
+teleporter/SM
+teleporters
+testnet/MS
+trie/MS
+trustless/Y
+ubuntu/M
+union/MSG
+unservable/B
+validator/SM
+w3f/MS
+wasm/M
+WND/S
+XCM/S
+XCMP/M
+include/BG
+isolate/BG
\ No newline at end of file

.config/spellcheck.toml

+[hunspell]
+lang = "en_US"
+search_dirs = ["."]
+extra_dictionaries = ["lingua.dic"]
+
+[hunspell.quirks]
+# `Type`'s
+# 5x
+# He tagged it as 'TheGreatestOfAllTimes'
+transform_regex = ["^'([^\\s])'$", "^[0-9]+(?:\\.[0-9]*)?x$", "^'s$", "^\\+$"]
+allow_concatenation = true
+allow_dashes = true