docs: make the readme a lot simpler

README.md

@@ -4,54 +4,23 @@
 
 [![Node.js CI](https://github.com/iyxan23/ooxml-templater-js/actions/workflows/node.js.yml/badge.svg)](https://github.com/iyxan23/ooxml-templater-js/actions/workflows/node.js.yml)
 
-No-nonsense minimally invasive docx and xlsx templater written in pure
-typescript, featuring a functional language.
+Template within your docs, and xlsx files.
+
+## What is this?
+
+A library for templating within your docx and xlsx files (.pptx unplanned). It
+works by modifying the xml files in place without touching anything unrelated.
+
+It works on browsers and Node.js. See it live on [the site](https://iyxan23.github.io/ooxml-templater-js).
+
+There is a custom-developed language for working with sheets inspired by
+functional programming, making it deterministic, robust, and extremely
+composable. It's also possible to define your own functions, for extra
+customizability.
+
+[Read more about the sheet templating language here.](./docs/sheet-how-to.md)
 
 ## Getting Started
 
 Check this [doc for more info](docs/getting-started.md). You can also try it out
 on the live astro-powered demo [here](https://iyxan23.github.io/ooxml-templater-js/).
-
-## Wait what?
-
-> What does minimally invasive even mean?
-
-This means that the library does as little as it could to the original structure
-of the template. It does not parse any style info, page setups, or anything else
-that is unrelated to the templating itself (replacing specific text within the
-document/sheet).
-
-Think of it as a surgery, it only changes the parts that it needed to change
-and minimizes the amount of damage it could do to other parts of the file. This
-is due to me not having much experience in parsing ooxml files, where, who knows
-it might break something I didn't want to break.
-
-In short, it replaces the texts and duplicates existing text (with its style
-data and all).
-
-## wat dis?!
-
-```
-[A] yo we got `report-template.xlsx`, can you fill it out with data:
- |  { ... big json data ... }
- +  Thanks!
-    attached: report-template.xlsx
-
-[B] 1000iq mode, does
- |
- |    import { xlsxFillTemplate } from "ooxml-templater-xlsx";
- |    xlsxFillTemplate(file.stream(), output, theData);
- |
- +  Here's the result:
-    attached: Q1-report.xlsx
-
-[A] ah, we need a whole year, from Q1 to Q4.
-
-[B] say less
- |
- |    quarters.forEach((i) =>
- |      xlsxFillTemplate(i.stream(), outputStream, quarterData[i])
- |    );
- +
-   attached: Q1-report.xlsx, Q2-report.xlsx, Q3-report.xlsx, Q4-report.xlsx
-```