Switch from JuliaFormatter to Runic.jl for code formatting

- Update CI workflow to use fredrikekre/runic-action@v1
- Remove .JuliaFormatter.toml configuration
- Format all source files with Runic.jl

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: claude

.JuliaFormatter.toml

@@ -4,39 +4,16 @@ on:
   push:
     branches:
       - 'master'
+      - 'main'
       - 'release-'
     tags: '*'
   pull_request:
 
 jobs:
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        julia-version: [1]
-        julia-arch: [x86]
-        os: [ubuntu-latest]
+  runic:
+    runs-on: ubuntu-latest
     steps:
-      - uses: julia-actions/setup-julia@latest
+      - uses: actions/checkout@v4
+      - uses: fredrikekre/runic-action@v1
         with:
-          version: ${{ matrix.julia-version }}
-
-      - uses: actions/checkout@v6
-      - name: Install JuliaFormatter and format
-        # This will use the latest version by default but you can set the version like so:
-        #
-        # julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter", version="0.13.0"))'
-        run: |
-          julia  -e 'using Pkg; Pkg.add(PackageSpec(name="JuliaFormatter"))'
-          julia  -e 'using JuliaFormatter; format(".", verbose=true)'
-      - name: Format check
-        run: |
-          julia -e '
-          out = Cmd(`git diff`) |> read |> String
-          if out == ""
-              exit(0)
-          else
-              @error "Some files have not been formatted !!!"
-              write(stdout, out)
-              exit(1)
-          end'
+          version: '1'