chore: add crates.io metadata and release workflow

Add authors, keywords, and categories to Cargo.toml.
Add GitHub Actions workflow to publish to crates.io on tag push.

Author: krfl

.github/workflows/release.yml

@@ -0,0 +1,30 @@
+name: Release to crates.io
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    name: Check & Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo clippy -- -D warnings
+      - run: cargo test
+
+  publish:
+    name: Publish to crates.io
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - run: cargo publish
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

Cargo.toml

@@ -2,10 +2,13 @@
 name = "gitocular"
 version = "1.0.0"
 edition = "2024"
+authors = ["krfl <2630397+krfl@users.noreply.github.com>"]
 license = "Apache-2.0"
 description = "A TUI dashboard for monitoring git repository status"
 repository = "https://github.com/krfl/gitocular"
 rust-version = "1.86"
+keywords = ["git", "tui", "dashboard", "terminal"]
+categories = ["command-line-utilities", "development-tools"]
 
 [[bin]]
 name = "gitocular"