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Add directions for rqlite (#80)

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| Go | `go get -u github.com/asg017/sqlite-vec/bindings/go` | [`sqlite-vec` with Go](https://alexgarcia.xyz/sqlite-vec/go.html) | [![Go Reference](https://pkg.go.dev/badge/github.com/asg017/sqlite-vec-go-bindings/cgo.svg)](https://pkg.go.dev/github.com/asg017/asg017/sqlite-vec-go-bindings/cgo) |
| Rust | `cargo add sqlite-vec` | [`sqlite-vec` with Rust](https://alexgarcia.xyz/sqlite-vec/rust.html) | [![Crates.io](https://img.shields.io/crates/v/sqlite-vec?logo=rust)](https://crates.io/crates/sqlite-vec) |
| Datasette | `datasette install datasette-sqlite-vec` | [`sqlite-vec` with Datasette](https://alexgarcia.xyz/sqlite-vec/datasette.html) | [![Datasette](https://img.shields.io/pypi/v/datasette-sqlite-vec.svg?color=B6B6D9&label=Datasette+plugin&logoColor=white&logo=python)](https://datasette.io/plugins/datasette-sqlite-vec) |
| rqlite | `rqlited -extensions-path=sqlite-vec.tar.gz` | [`sqlite-vec` with rqlite](https://alexgarcia.xyz/rqlite.html) | [![rqlite](https://img.shields.io/badge/rqlite-sqlite_extensions-blue)](https://rqlite.io/docs/guides/extensions/) |
| `sqlite-utils` | `sqlite-utils install sqlite-utils-sqlite-vec` | [`sqlite-vec` with sqlite-utils](https://alexgarcia.xyz/sqlite-vec/sqlite-utils.html) | [![sqlite-utils](https://img.shields.io/pypi/v/sqlite-utils-sqlite-vec.svg?color=B6B6D9&label=sqlite-utils+plugin&logoColor=white&logo=python)](https://datasette.io/plugins/datasette-sqlite-vec) |
| Github Release | | | ![GitHub tag (latest SemVer pre-release)](https://img.shields.io/github/v/tag/asg017/sqlite-vec?color=lightgrey&include_prereleases&label=Github+release&logo=github) |

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# Using `sqlite-vec` in rqlite
[rqlite](https://rqlite.io/) users can use `sqlite-vec` with rqlite by loading the extension when they launch their rqlite node:
```bash
# Download a sqlite-vec release.
curl -L https://github.com/asg017/sqlite-vec/releases/download/v0.1.1/sqlite-vec-0.1.1-loadable-linux-x86_64.tar.gz -o sqlite-vec.tar.gz
# Tell rqlite to load sqlite-vec at launch time.
rqlited -extensions-path=sqlite-vec.tar.gz data
```
Once loaded you can use sqlite-vec functionality within rqlite. For example, you can perform searches via the [rqlite shell](https://rqlite.io/docs/cli/):
```
$ rqlite
Welcome to the rqlite CLI.
Enter ".help" for usage hints.
Connected to http://127.0.0.1:4001 running version 8
127.0.0.1:4001> create virtual table vec_examples using vec0(
Error: incomplete input
127.0.0.1:4001> create virtual table vec_examples using vec0(sample_embedding float[8]);
1 row affected
127.0.0.1:4001> insert into vec_examples(rowid, sample_embedding) values (1, '[-0.200, 0.250, 0.341, -0.211, 0.645, 0.935, -0.316, -0.924]'), (2, '[0.443, -0.501, 0.355, -0.771, 0.707, -0.708, -0.185, 0.362]'), (3, '[0.716, -0.927, 0.134, 0.052, -0.669, 0.793, -0.634, -0.162]'), (4, '[-0.710, 0.330, 0.656, 0.041, -0.990, 0.726, 0.385, -0.958]')
4 rows affected
127.0.0.1:4001> select rowid, distance from vec_examples where sample_embedding match '[0.890, 0.544, 0.825, 0.961, 0.358, 0.0196, 0.521, 0.175]' order by distance limit 2
+-------+-------------------+
| rowid | distance |
+-------+-------------------+
| 2 | 2.386873722076416 |
+-------+-------------------+
| 1 | 2.389785051345825 |
+-------+-------------------+
```
You can learn more from the [rqlite website](https://rqlite.io/docs/guides/extensions/).