feat: initial slack-cli MVP

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: short
+
+jobs:
+  test:
+    name: test (${{ matrix.os }})
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: install libdbus on linux
+        if: matrix.os == 'ubuntu-latest'
+        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends libdbus-1-dev pkg-config
+      - uses: jdx/mise-action@5083fe46898c414b2475087cc79da59e7da859e8 # v2.1.11
+        with:
+          install: true
+          cache: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: ensure rustfmt + clippy components
+        # `mise.toml` requests rust profile=default, but mise's rust backend
+        # may install a cached minimal toolchain. Add the components
+        # explicitly so `cargo fmt` and `cargo clippy` always resolve.
+        run: rustup component add rustfmt clippy
+      - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.7.4
+      - uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-nextest
+      - name: fmt check
+        if: matrix.os == 'ubuntu-latest'
+        run: cargo fmt --all -- --check
+      - name: clippy
+        run: cargo clippy --all-targets -- -D warnings
+      - name: nextest
+        run: cargo nextest run --all-targets
+      - name: docs
+        if: matrix.os == 'ubuntu-latest'
+        env:
+          RUSTDOCFLAGS: -D warnings
+        run: cargo doc --no-deps --document-private-items
+
+  deny:
+    name: cargo-deny
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: jdx/mise-action@5083fe46898c414b2475087cc79da59e7da859e8 # v2.1.11
+        with:
+          install: true
+          cache: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - run: cargo deny check advisories bans licenses sources
+
+  msrv:
+    name: msrv
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: install build deps for keyring (libdbus on linux)
+        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends libdbus-1-dev pkg-config
+      - uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # stable
+        with:
+          toolchain: "1.89"
+      - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.7.4
+      - run: cargo check --all-features
+
+  linux-headless:
+    name: linux headless (no D-Bus)
+    runs-on: ubuntu-latest
+    container:
+      image: rust:1.89-slim
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: install build deps
+        run: |
+          apt-get update
+          apt-get install -y --no-install-recommends pkg-config build-essential ca-certificates libdbus-1-dev
+      - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.7.4
+      - run: cargo test --tests

.github/workflows/release.yml

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+name: release
+
+on:
+  push:
+    tags: ['v*']
+
+permissions:
+  contents: write
+
+jobs:
+  upload:
+    name: upload-${{ matrix.target }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - target: x86_64-unknown-linux-musl
+            os: ubuntu-latest
+          - target: aarch64-unknown-linux-musl
+            os: ubuntu-latest
+          - target: x86_64-apple-darwin
+            os: macos-latest
+          - target: aarch64-apple-darwin
+            os: macos-latest
+          - target: x86_64-pc-windows-msvc
+            os: windows-latest
+          - target: aarch64-pc-windows-msvc
+            os: windows-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: taiki-e/upload-rust-binary-action@d94c2c5e7a35e7d1edd0e6e3b3a4d2d9b94f4f1f # v1.22.1
+        with:
+          bin: slack-cli
+          target: ${{ matrix.target }}
+          archive: slack-cli-${{ github.ref_name }}-${{ matrix.target }}
+          checksum: sha256
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+  changelog:
+    name: changelog
+    runs-on: ubuntu-latest
+    needs: upload
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+      - uses: jdx/mise-action@5083fe46898c414b2475087cc79da59e7da859e8 # v2.1.11
+        with:
+          install: true
+          cache: true
+      - run: git cliff --tag ${{ github.ref_name }} --output CHANGELOG.md
+      - name: upload CHANGELOG to release
+        uses: softprops/action-gh-release@c062e08bd532815e2082a85e87e3ef29c3e6d191 # v2.0.8
+        with:
+          files: CHANGELOG.md

.gitignore

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+# Rust
+/target/
+**/*.rs.bk
+*.pdb
+
+# Cargo
+Cargo.lock.bak
+
+# IDE / editor
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Local env / secrets
+.env
+.env.local
+*.local.toml
+
+# Test outputs
+/tarpaulin-report.html
+/coverage/
+
+# insta snapshot pending files
+**/*.snap.new