chore: introduce crate-ci/typos (#2430)

## Description

Avoid having typos in the codebase.

Closes #2396

## Breaking Changes

No.

## Notes & open questions

<!-- Any notes, remarks or open questions you have to make about the PR.
-->

## Change checklist

- [ ] Self-review.
- [ ] Documentation updates if relevant.
- [ ] Tests if relevant.
- [ ] All breaking changes documented.

src/engine.rs

@@ -379,7 +379,7 @@ impl DefaultAuthorStorage {
     }
 }
 
-/// Peristent default author for a docs engine.
+/// Persistent default author for a docs engine.
 #[derive(Debug)]
 pub struct DefaultAuthor {
     value: RwLock<AuthorId>,

src/store/fs.rs

@@ -343,7 +343,7 @@ impl Store {
         })
     }
 
-    /// Delte an author.
+    /// Delete an author.
     pub fn delete_author(&mut self, author: AuthorId) -> Result<()> {
         self.modify(|tables| {
             tables.authors.remove(author.as_bytes())?;
@@ -881,7 +881,7 @@ impl Iterator for ParentIterator {
 /// a database snapshot open until it is dropped.
 ///
 /// Also, this represents a snapshot of the database at the time of creation.
-/// It nees a copy of a redb::ReadOnlyTable to be self-contained.
+/// It needs a copy of a redb::ReadOnlyTable to be self-contained.
 #[derive(derive_more::Debug)]
 pub struct ContentHashesIterator {
     #[debug(skip)]