UPDATE: Introducing TironCalc, or Tiron for friends

tironcalc/README.md

@@ -0,0 +1,52 @@
+# TironCalc
+
+[![Discord chat][discord-badge]][discord-url]
+
+[discord-badge]: https://img.shields.io/discord/1206947691058171904.svg?logo=discord&style=flat-square
+[discord-url]: https://discord.gg/zZYWfh3RHJ
+
+TironCalc, or Tiron for friends, is a TUI (Terminal User Interface) for IronCalc. Based on [ratatui](https://github.com/ratatui-org/ratatui)
+
+![TironCalc Screenshot](screenshot.png)
+
+## Build
+
+```
+cargo build --release
+```
+
+You will find the binary at `./target/release/tiron`.
+
+## Documentation
+
+Start empty project:
+
+```
+$ tiron
+```
+
+Load an existing Excel file:
+
+```
+$ tiron example.xlsx
+```
+
+-   `e` to edit a cell and enter the value or formula.
+-   `q` to quit and save
+-   `+` to add a sheet
+-   `s` to go to the next sheet
+-   `PgUp/PgDown` to navigate rows faster
+-   `u` undo changes
+-   `U` redo changes
+-   `r` insert row
+-   `c` insert column
+-   `C` delete column
+-   `R` delete row
+-   `
+
+
+## Inspiration
+
+James Gosling of Java fame created [sc](https://en.wikipedia.org/wiki/Sc_(spreadsheet_calculator)) the spreadsheet calculator.
+
+Andrés Martinelli has been maintaining [sc-im](https://github.com/andmarti1424/sc-im), the spreadsheet calculator improvised.