sqlite parent issue

Goal: compile and run sqlite3.
All sqlite issues: https://github.com/opencompl/veir/issues?q=is%3Aissue%20state%3Aopen%20label%3Asqlite. Feel free to pick them up!

sqlite3 is defined to be the 1-file sqlite amalgamation.
`curl -O https://sqlite.org/2026/sqlite-amalgamation-3530300.zip` to get it.

The entire "compile and run" will likely be done in stages:
1. parse;
2. emit;
3. interpret;
4. lower to risc-v.

Parsing status: You can get the latest parsing error by running `Tools/vcc /path/to/sqlite3.c`.