feat(corp/tvixbolt): check in initial tvixbolt version

This is the code backing the small site currently deployed at
https://tazj.in/blobs/nixbolt/index.html

This relies on a newer version of Tvix than is available in depot and
a bunch of other stuff that isn't public yet, so for now no build file
is provided as this is heavily work-in-progress.

Change-Id: I7a8e4dbf4e11d1c70175f929e65f40ff69acbbd9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6315
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>

corp/tvixbolt/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "tvixbolt"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+yew = "0.19.3"
+codemap = "0.1.3"
+web-sys = "*"
+
+[dependencies.rnix]
+git = "https://github.com/nix-community/rnix-parser.git"
+rev = "97b438e34be5211a4b48aeed9cc3ded489b4d6da"
+
+[dependencies.tvix-eval]
+path = "../tvix-eval/tvix/eval"
+default-features = false
+features = [ "disassembler" ]