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/chain-selection/src/backend.rs

@@ -45,7 +45,7 @@ pub(super) trait Backend {
 	fn load_leaves(&self) -> Result<LeafEntrySet, Error>;
 	/// Load the stagnant list at the given timestamp.
 	fn load_stagnant_at(&self, timestamp: Timestamp) -> Result<Vec<Hash>, Error>;
-	/// Load all stagnant lists up to and including the given UNIX timestamp
+	/// Load all stagnant lists up to and including the given Unix timestamp
 	/// in ascending order.
 	fn load_stagnant_at_up_to(&self, up_to: Timestamp)
 		-> Result<Vec<(Timestamp, Vec<Hash>)>, Error>;

polkadot/node/core/chain-selection/src/db_backend/v1.rs

@@ -26,7 +26,7 @@
 //! ```
 //!
 //! The big-endian encoding is used for creating iterators over the key-value DB which are
-//! accessible by prefix, to find the earlist block number stored as well as the all stagnant
+//! accessible by prefix, to find the earliest block number stored as well as the all stagnant
 //! blocks.
 //!
 //! The `Vec`s stored are always non-empty. Empty `Vec`s are not stored on disk so there is no

polkadot/node/core/chain-selection/src/lib.rs

@@ -534,7 +534,7 @@ async fn handle_active_leaf(
 				);
 
 				// If we don't know the weight, we can't import the block.
-				// And none of its descendents either.
+				// And none of its descendants either.
 				break;
 			}
 			Some(w) => w,