Feature
* Add examples ([`ff9b2d1`](https://github.com/devind-team/xlsx_evaluate/commit/ff9b2d14b02cb6d08f14b744c110aba6f79b79bb))
* Add evaluator and rst/md files ([`ee99d8d`](https://github.com/devind-team/xlsx_evaluate/commit/ee99d8d89deb9d4a0f7edea77e56719f0d00dd7c))
* Add tokenizer, parser and model ([`4c6f8b6`](https://github.com/devind-team/xlsx_evaluate/commit/4c6f8b62717e987789d52f0c724cfbd1023efca2))
* Build ast nodes ([`9dd83ea`](https://github.com/devind-team/xlsx_evaluate/commit/9dd83eae96c43466b3254118befcfb4739c45160))
* Function in Excel ([`590951d`](https://github.com/devind-team/xlsx_evaluate/commit/590951d13fa60f0f5c2e8312c0f5ceace8efa703))
* Utils and types ([`729fa0b`](https://github.com/devind-team/xlsx_evaluate/commit/729fa0b10f305acd95791f1e375d07b756aed284))
* Utils and types ([`1f75316`](https://github.com/devind-team/xlsx_evaluate/commit/1f753169b51670c120f397f7dec6394759754280))
Fix
* Test ([`4c6a9a7`](https://github.com/devind-team/xlsx_evaluate/commit/4c6a9a72c39e94474c23c7324c4a1dcf99c14514))
* Code formatting ([`4a7a50b`](https://github.com/devind-team/xlsx_evaluate/commit/4a7a50b18902b4019ccd2c6eecfdf633399a274b))