ci(check-and-build-and-test): in the msrv job, remove the crate_directory dimension for a speed up (instead, I just copied and pasted the steps for it)

.github/workflows/check-and-build-and-test.yml

@@ -205,13 +205,6 @@ jobs:
   msrv:
     strategy:
       matrix:
-        crate_directory:
-          - ./core
-          - ./cli-clap
-          - ./gui-eframe
-          - ./tui-ratatui
-          - ./multibinary
-
         supporteds:
           - runner: macos-latest
             target: aarch64-apple-darwin
@@ -222,7 +215,7 @@ jobs:
           - prerequisite_step: rm ~/.cargo/bin/cargo.exe; rm ~/.cargo/bin/rust-analyzer.exe; rm ~/.cargo/bin/rustfmt.exe; rustup update
             runner: windows-latest
             target: x86_64-pc-windows-msvc
-    name: Verify MSRV of ${{ matrix.crate_directory }} for ${{ matrix.supporteds.target }} (on ${{ matrix.supporteds.runner }})
+    name: Verify MSRV for ${{ matrix.supporteds.target }} (on ${{ matrix.supporteds.runner }})
     runs-on: ${{ matrix.supporteds.runner }}
     timeout-minutes: 8
     steps:
@@ -243,6 +236,18 @@ jobs:
         with:
           tool: cargo-msrv
 
-      - name: Verify declared MSRV (minimum supported Rust version)
+      - name: Verify core's declared MSRV (minimum supported Rust version)
         run: cargo-msrv verify --output-format json
-        working-directory: ${{ matrix.crate_directory }}
+        working-directory: ./core
+      - name: Verify cli-clap's declared MSRV (minimum supported Rust version)
+        run: cargo-msrv verify --output-format json
+        working-directory: ./cli-clap
+      - name: Verify gui-eframe's declared MSRV (minimum supported Rust version)
+        run: cargo-msrv verify --output-format json
+        working-directory: ./gui-eframe
+      - name: Verify tui-ratatui's declared MSRV (minimum supported Rust version)
+        run: cargo-msrv verify --output-format json
+        working-directory: ./tui-ratatui
+      - name: Verify multibinary's declared MSRV (minimum supported Rust version)
+        run: cargo-msrv verify --output-format json
+        working-directory: ./multibinary