WIP: CI: add spellcheck (#3421)

* CI: add spellcheck

* revert me

* CI: explicit command for spellchecker

* spellcheck: edit misspells

* CI: run spellcheck on diff

* spellcheck: edits

* spellcheck: edit misspells

* spellcheck: add rules

* spellcheck: mv configs

* spellcheck: more edits

* spellcheck: chore

* spellcheck: one more thing

* spellcheck: and another one

* spellcheck: seems like it doesn't get to an end

* spellcheck: new words after rebase

* spellcheck: new words appearing out of nowhere

* chore

* review edits

* more review edits

* more edits

* wonky behavior

* wonky behavior 2

* wonky behavior 3

* change git behavior

* spellcheck: another bunch of new edits

* spellcheck: new words are koming out of nowhere

* CI: finding the master

* CI: fetching master implicitly

* CI: undebug

* new errors

* a bunch of new edits

* and some more

* Update node/core/approval-voting/src/approval_db/v1/mod.rs

Co-authored-by: Andronik Ordian <write@reusable.software>

* Update xcm/xcm-executor/src/assets.rs

Co-authored-by: Andronik Ordian <write@reusable.software>

* Apply suggestions from code review

Co-authored-by: Andronik Ordian <write@reusable.software>

* Suggestions from the code review

* CI: scan only changed files

Co-authored-by: Andronik Ordian <write@reusable.software>

polkadot/node/core/approval-voting/src/lib.rs

@@ -121,7 +121,7 @@ enum Mode {
 
 /// The approval voting subsystem.
 pub struct ApprovalVotingSubsystem {
-	/// LocalKeystore is needed for assignment keys, but not necessarily approval keys.
+	/// `LocalKeystore` is needed for assignment keys, but not necessarily approval keys.
 	///
 	/// We do a lot of VRF signing and need the keys to have low latency.
 	keystore: Arc<LocalKeystore>,
@@ -145,7 +145,7 @@ struct MetricsInner {
 	time_recover_and_approve: prometheus::Histogram,
 }
 
-/// Aproval Voting metrics.
+/// Approval Voting metrics.
 #[derive(Default, Clone)]
 pub struct Metrics(Option<MetricsInner>);