[ENH] We own the chroma crate (chroma-core#2870)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
	 - ...
 - New functionality
	 - ...

## Test plan
*How are these changes tested?*

- [ ] Tests pass locally with `pytest` for python, `yarn test` for js,
`cargo test` for rust

## Documentation Changes
*Are all docstrings for user-facing APIs updated if required? Do we need
to make documentation changes in the [docs
repository](https://github.com/chroma-core/docs)?*

Author: rescrv

.gitignore

@@ -18,8 +18,8 @@ index_data
 
 # Default configuration for persist_directory in chromadb/config.py
 # Currently it's located in "./chroma/"
-chroma/
-chroma_test_data/
+/chroma/
+/chroma_test_data/
 server.htpasswd
 server.authz
 server.authn

Cargo.lock

@@ -2,16 +2,17 @@
 resolver = "2"
 
 members = [
+   "rust/benchmark-datasets",
    "rust/blockstore",
    "rust/cache",
+   "rust/chroma",
    "rust/config",
    "rust/distance",
    "rust/error",
    "rust/index",
    "rust/storage",
    "rust/types",
    "rust/worker",
-   "rust/benchmark-datasets",
 ]
 
 [workspace.dependencies]

Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "chroma"
+version = "0.1.0"
+edition = "2021"
+description = "Placeholder for trychroma.com"
+license = "Apache-2.0"
+
+[dependencies]

rust/chroma/Cargo.toml

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}