Remove taskchampion source from this repo (#3427)

* move taskchampion-lib to src/tc/lib, remove the rest
* update references to taskchampion
* Use a top-level Cargo.toml so everything is consistent
* apply comments from ryneeverett

.github/workflows/checks.yml

@@ -44,22 +44,6 @@ jobs:
           args: --all-features
           name: "Clippy Results"
 
-  mdbook:
-    runs-on: ubuntu-latest
-    name: "Documentation"
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup mdBook
-        uses: peaceiris/actions-mdbook@v2
-        with:
-          # if this changes, change it in .github/workflows/publish-docs.yml as well
-          mdbook-version: '0.4.10'
-
-      - run: mdbook test taskchampion/docs
-      - run: mdbook build taskchampion/docs
-
   fmt:
     runs-on: ubuntu-latest
     name: "Formatting"

.github/workflows/publish-docs.yml

@@ -1,31 +0,0 @@
-name: docs
-
-on:
-  push:
-    branches:
-      - develop
-
-permissions:
-  contents: write
-
-jobs:
-  mdbook-deploy:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Setup mdBook
-        uses: peaceiris/actions-mdbook@v2
-        with:
-          # if this changes, change it in .github/workflows/checks.yml as well
-          mdbook-version: '0.4.10'
-
-      - run: mdbook build taskchampion/docs
-
-      - name: Deploy
-        uses: peaceiris/actions-gh-pages@v4
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./taskchampion/docs/book
-          destination_dir: taskchampion

.github/workflows/rust-tests.yml

@@ -1,83 +0,0 @@
-
-name: tests - rust
-
-on:
-  push:
-    branches:
-      - develop
-  pull_request:
-    types: [opened, reopened, synchronize]
-
-jobs:
-  ## Run the `taskchampion` crate's tests with various combinations of features.
-  features:
-    strategy:
-      matrix:
-        features:
-          - ""
-          - "server-sync"
-
-    name: "taskchampion ${{ matrix.features == '' && 'with no features' || format('with features {0}', matrix.features) }}"
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Cache cargo registry
-        uses: actions/cache@v4
-        with:
-          path: ~/.cargo/registry
-          key: ubuntu-latest-stable-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
-
-      - name: Cache cargo build
-        uses: actions/cache@v4
-        with:
-          path: target
-          key: ubuntu-latest-stable-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
-
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          override: true
-
-      - name: test
-        run: cargo test -p taskchampion --no-default-features --features "${{ matrix.features }}"
-
-  ## Run all TaskChampion crate tests, using both the minimum supported rust version
-  ## and the latest stable Rust.
-  test:
-    strategy:
-      matrix:
-        rust:
-          - "1.70.0" # MSRV
-          - "stable"
-        os:
-          - ubuntu-latest
-          - macOS-latest
-          - windows-latest
-
-    name: "rust ${{ matrix.rust }} on ${{ matrix.os }}"
-    runs-on: ${{ matrix.os }}
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Cache cargo registry
-        uses: actions/cache@v4
-        with:
-          path: ~/.cargo/registry
-          key: ${{ runner.os }}-${{ matrix.rust }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
-
-      - name: Cache cargo build
-        uses: actions/cache@v4
-        with:
-          path: target
-          key: ${{ runner.os }}-${{ matrix.rust }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
-
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: "${{ matrix.rust }}"
-          override: true
-
-      - name: test
-        run: cargo test