Rename the crate from invoiceninjars to invoiceninja-sdk

The package name has never matched the repository it lives in
(gitea.awkawb.cloud/awkawb/invoiceninja-sdk, mirrored to
github.com/awkawb1/invoiceninja-sdk) — both pointed at `invoiceninja-sdk`
while `Cargo.toml` declared `invoiceninjars`. Lines everything up on the
name the repo has always used.

Cargo derives the crate's Rust identifier from the package name by
lowercasing hyphens to underscores, so every `use invoiceninjars::...`
becomes `use invoiceninja_sdk::...` — in doctests across `src/`, the four
examples, all four integration test files, and `README.md`. `Cargo.lock`'s
own self-entry picked up the new name on the next `cargo check`, which is
also when the rename gets its real check: every doctest and every test file
has to resolve the new path to compile at all, not just the ones a grep
happens to catch.

`flake.nix`'s `pname` and description follow, so `nix build` produces
`invoiceninja-sdk-0.1.0.drv` rather than a name that no longer matches
anything. `GOALS.md`'s two mentions — the hypothetical CLI's name and the
`cargo install` example — follow too, for the same reason.

Verified clean on both the dev toolchain and the 1.88 MSRV shell: full test
suite (209 tests), clippy, fmt, and `nix build`/`nix flake check`.

Not yet published to crates.io (checked: the name 404s there), so this
lands before the old name was ever claimed — no one's `Cargo.toml` breaks
today, but it's recorded as a Changed entry since `GOALS.md` asks for
breaking changes to be legible in the changelog rather than discovered at
compile time, and the crate is reachable as a git dependency regardless of
crates.io status.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/client.rs

@@ -219,8 +219,8 @@ impl InvoiceNinjaClient {
     /// It used to be refused locally with a misleading `InvalidToken`.
     ///
     /// ```no_run
-    /// # fn main() -> invoiceninjars::Result<()> {
-    /// use invoiceninjars::InvoiceNinjaClient;
+    /// # fn main() -> invoiceninja_sdk::Result<()> {
+    /// use invoiceninja_sdk::InvoiceNinjaClient;
     ///
     /// let client = InvoiceNinjaClient::hosted(std::env::var("IN_API_TOKEN").unwrap())?
     ///     .with_api_password(std::env::var("IN_API_PASSWORD").unwrap())?;
@@ -1367,8 +1367,8 @@ impl InvoiceNinjaClient {
     /// for — [`Invoice`], [`Quote`], [`Credit`], or [`PurchaseOrder`]:
     ///
     /// ```no_run
-    /// # async fn run(client: &invoiceninjars::InvoiceNinjaClient) -> invoiceninjars::Result<()> {
-    /// use invoiceninjars::models::Invoice;
+    /// # async fn run(client: &invoiceninja_sdk::InvoiceNinjaClient) -> invoiceninja_sdk::Result<()> {
+    /// use invoiceninja_sdk::models::Invoice;
     /// use serde_json::json;
     ///
     /// let invoice: Invoice = client

src/lib.rs

@@ -1,9 +1,9 @@
 //! An async Rust client for the [Invoice Ninja](https://www.invoiceninja.com/) v5 API.
 //!
 //! ```no_run
-//! use invoiceninjars::{InvoiceNinjaClient, models::ListParams};
+//! use invoiceninja_sdk::{InvoiceNinjaClient, models::ListParams};
 //!
-//! # async fn run() -> invoiceninjars::Result<()> {
+//! # async fn run() -> invoiceninja_sdk::Result<()> {
 //! let client = InvoiceNinjaClient::new(
 //!     "https://invoicing.co/api/v1",
 //!     std::env::var("IN_API_TOKEN").unwrap(),

src/models/common.rs

@@ -104,7 +104,7 @@ impl ListParams {
     /// not cover.
     ///
     /// ```
-    /// use invoiceninjars::models::ListParams;
+    /// use invoiceninja_sdk::models::ListParams;
     ///
     /// let params = ListParams::new()
     ///     .per_page(100)

src/upload.rs

@@ -11,7 +11,7 @@ use crate::error::{Error, Result};
 /// question in `GOALS.md`.
 ///
 /// ```
-/// use invoiceninjars::FileUpload;
+/// use invoiceninja_sdk::FileUpload;
 ///
 /// let file = FileUpload::new("receipt.pdf", b"%PDF-1.4 ...".to_vec())
 ///     .mime("application/pdf");