Tweak documentation

Vidyut is the Crate of the Week [1] and could use a stronger intro.

[1]: https://this-week-in-rust.org/blog/2025/01/15/this-week-in-rust-582/

CONTRIBUTING.md

@@ -180,6 +180,6 @@ Spread the word
 
 Vidyut is still a new project, and much of the Sanskrit ecosystem does not know
 about it. If you know someone working on Sanskrit software, please let them
-know that Vidyut exists and might help with some of their problems. Our hope is
-that Vidyut will free programmers up to work on more interesting and ambitious
-problems.
+know that Vidyut exists and might help with some of their problems. Ultimately,
+our hope is that Vidyut will give programmers the freedom and tools to work on
+more interesting and ambitious projects.

README.md

@@ -2,7 +2,22 @@
 <h1>विद्युत्</h1>
 </div>
 
-Vidyut provides reliable infrastructure for Sanskrit software.
+Vidyut provides reliable infrastructure for Sanskrit software. Specifically,
+Vidyut aims to provide performant and high-quality solutions for the common
+problems that Sanskrit programmers face. Some of these problems include:
+
+- *Transliteration*, or conversion of Sanskrit text from one script to another. (``भू`` → ``bhū``)
+
+- *Word generation*, or converting bases and suffixes into complete words. (``भू`` → ``भवति``)
+
+- *Word lookup*, or mapping a complete word back to its bases and suffixes. (``भवति`` → ``भू``)
+
+- *Metrical analysis*, or understanding the meter used by a piece of Sanskrit text.
+
+- *Sandhi changes*, or applying and undoing the sound changes that occur between pieces of
+  Sanskrit text.
+
+- *Segmentation*, or splitting a piece of Sanskrit text into distinct words.
 
 Vidyut compiles to fast and efficient native code, and it can be bound to other
 programming languages with minimal work. We provide first-class support for