feat(corp/russian/data-import): new OpenCorpora data import tool

Adds the beginning of a tool which can import OpenCorpora data into a
SQLite database. This is quite a lot of toil and there's probably a
better way to do this, but overall becoming this intimately familiar
with the data structures is quite helpful for understanding what I
can/can't do with only this dataset.

Change-Id: Ieab33a8ce07ea4ac87917b9c8132226bbc6523b1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7859
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI

corp/russian/data-import/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "data-import"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+env_logger = "0.10.0"
+log = "0.4.17"
+rusqlite = "0.28"
+xml-rs = "0.8"
+
+[profile.release-with-debug]
+inherits = "release"
+debug = true