chore(lib): continuation of v3 refactor (see #117) (#120)

* fix!: adjustments after refactor

* Update README.md

Co-authored-by: Jérome Eertmans <[email protected]>

* docs(changelog): remove mention of support for markdown and typst files for now

* refactor: use `check::Request`, `check::Response` and `check::ResponseWithContext`

* chore: formatting

* fix: minimum Rust version needs to be higher for `clap`

* fix: doc test

* refactor: use crate's result type for the `check` method on `Client`

* refactor: use crate's result type for the `languages` method on `Client`

* Update src/api/mod.rs

Co-authored-by: Jérome Eertmans <[email protected]>

* Update src/api/mod.rs

Co-authored-by: Jérome Eertmans <[email protected]>

* fix: convert `reqwest` error

---------

Co-authored-by: Jérome Eertmans <[email protected]>

CHANGELOG.md

@@ -7,14 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [3.0.0](https://github.com/jeertmans/languagetool-rust/compare/v2.1.4...v2.1.5)
 
-- Added support for Mardown and Typst files.
+- **Breaking** Stopped (de)serializing structs that did not need it.
   [#117](https://github.com/jeertmans/languagetool-rust/pull/117)
-
-### Chore
-
-- **Breaking** Stopped (de)serializing structs that did not need.
-  [#117](https://github.com/jeertmans/languagetool-rust/pull/117)
-- **Breaking** Completly reorganized the crate.
+- **Breaking** Completely reorganized the crate.
   [#117](https://github.com/jeertmans/languagetool-rust/pull/117)
 
 ## [2.1.4](https://github.com/jeertmans/languagetool-rust/compare/v2.1.3...v2.1.4)
@@ -182,7 +177,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   [#6](https://github.com/jeertmans/languagetool-rust/pull/6)
 - Add compare links to release tags in CHANGELOG.
   [#9](https://github.com/jeertmans/languagetool-rust/pull/9)
-- Add action to check if can publish.
+- Add action to check if crate is publishable.
   [#11](https://github.com/jeertmans/languagetool-rust/pull/11)
 
 ### Added