feat: add Zed extension for codetime.dev activity tracking

Port of codetime-vscode. Zed exposes no editor-event or status-bar API
to extensions, so editing activity is captured via the language server
protocol instead: the WASM extension registers and launches a native
language server (codetime-ls) that turns didOpen/didChange/didSave into
CodeTime event logs and POSTs them to the API.

Consequence: the VS Code status-bar total has no Zed equivalent and is
dropped; tracking is unaffected.

Author: Jannchie

.github/workflows/release.yml

@@ -0,0 +1,76 @@
+name: Release codetime-ls
+
+# Tag a release (e.g. `git tag v0.1.0 && git push --tags`) to build the language
+# server for every platform the Zed extension downloads, and attach the
+# `codetime-ls-<target-triple>.zip` assets the extension looks for.
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    name: ${{ matrix.target }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+            cross: false
+          - os: ubuntu-latest
+            target: aarch64-unknown-linux-gnu
+            cross: true
+          - os: macos-latest
+            target: x86_64-apple-darwin
+            cross: false
+          - os: macos-latest
+            target: aarch64-apple-darwin
+            cross: false
+          - os: windows-latest
+            target: x86_64-pc-windows-msvc
+            cross: false
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Install cross
+        if: matrix.cross
+        run: cargo install cross --locked
+
+      - name: Build
+        shell: bash
+        run: |
+          if [ "${{ matrix.cross }}" = "true" ]; then
+            cross build -p codetime-ls --release --target ${{ matrix.target }}
+          else
+            cargo build -p codetime-ls --release --target ${{ matrix.target }}
+          fi
+
+      - name: Package
+        shell: bash
+        run: |
+          bin=codetime-ls
+          ext=""
+          if [[ "${{ matrix.target }}" == *windows* ]]; then ext=".exe"; fi
+          src="target/${{ matrix.target }}/release/${bin}${ext}"
+          out="codetime-ls-${{ matrix.target }}.zip"
+          # Zip must contain the binary at its root, named codetime-ls(.exe).
+          if command -v 7z >/dev/null 2>&1; then
+            cp "$src" "${bin}${ext}"
+            7z a "$out" "${bin}${ext}"
+          else
+            (cd "target/${{ matrix.target }}/release" && zip -j "$OLDPWD/$out" "${bin}${ext}")
+          fi
+
+      - name: Upload to release
+        uses: softprops/action-gh-release@v2
+        with:
+          files: codetime-ls-${{ matrix.target }}.zip

.gitignore

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+/target
+*.wasm