474: Disable typos on exact word r=MarinPostma a=MarinPostma
This PR introduces the `exact_word` setting to disable typo tolerance on custom words.
If a user query contains a word from `exact_words`, no typo derivation will be made for that particular word.
I have chosen to store the words in a FST, to save on deserialization, and allow for fast lookups.
I had some trouble with the `serde` module, and had to rename it `serde_impl`.
## steps:
- [x] introduce new settings to register words to disable typos on
- [x] in `typos`, return exact match is the current word is part of the word to disable typos for.
- [x] update `Context` to return the exact words dictionary.
- [x] merge #473
Co-authored-by: ad hoc <postma.marin@protonmail.com>
473: set minimum word len for typos r=MarinPostma a=MarinPostma
this PR allows the configuration on the minimum word length for typos.
The default values are the same as previously.
## steps
- [x] introduce settings for the minimum word length for 1 and 2 typos
- [x] update the settings update flow to set this setting
- [x] create a structure `TypoConfig` to configure typo tolerance in the query builder
- [x] in `typo`, use the configuration to create the appropriate query tree node.
- [x] extend `Context` to return the setting for minimum word length for typos
- [x] return correct error message for wrong settings.
- [x] merge #469
Co-authored-by: ad hoc <postma.marin@protonmail.com>
