chore: add LICENSE, README, CHANGELOG, and publish metadata

Add MIT license, README with usage/install instructions and hotkey
binding examples, CHANGELOG for v0.1.0, and complete Cargo.toml
metadata (repository, homepage, keywords, categories). Remove unused
niri-ipc dependency.

Cargo.lock

@@ -345,12 +345,6 @@ dependencies = [
  "hashbrown 0.16.1",
 ]
 
-[[package]]
-name = "itoa"
-version = "1.0.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
-
 [[package]]
 name = "jni-sys"
 version = "0.3.1"
@@ -498,16 +492,6 @@ dependencies = [
  "jni-sys 0.3.1",
 ]
 
-[[package]]
-name = "niri-ipc"
-version = "25.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12bd9eb4e437f5282ce853cf66837658379cb537b4b6bae687da59246005329a"
-dependencies = [
- "serde",
- "serde_json",
-]
-
 [[package]]
 name = "nix"
 version = "0.29.0"
@@ -747,7 +731,6 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "bytemuck",
- "niri-ipc",
  "nix",
  "pollster",
  "raw-window-handle",
@@ -824,19 +807,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "serde_json"
-version = "1.0.149"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
-dependencies = [
- "itoa",
- "memchr",
- "serde",
- "serde_core",
- "zmij",
-]
-
 [[package]]
 name = "shlex"
 version = "1.3.0"
@@ -1396,9 +1366,3 @@ dependencies = [
  "quote",
  "syn",
 ]
-
-[[package]]
-name = "zmij"
-version = "1.0.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"