chore: adopt remote dprint config, tidy examples

Extend dprint from a shared remote config and add the prettier
and exec plugins, formatting TOML via a new tombi.toml instead
of golangci-lint fmt. Taskfile.yml, scripts/build.sh, and
html_styles.css pick up the resulting reformat.

Exporter examples now write to a temp dir and clean up after
themselves instead of leaving output.md/.docx/.html in the
repo. Drop the stray internal/exporters/output.docx and ignore
internal/exporters/output.* going forward.

Taskfile.yml

@@ -210,13 +210,13 @@ tasks:
         sh: gofmt -s -l .
     cmds:
       - |
-          {{if ne .UNFORMATTED ""}}
-          echo "❌ The following files need formatting:"
-          echo "{{.UNFORMATTED}}"
-          exit 1
-          {{else}}
-          echo "All files are properly formatted"
-          {{end}}
+        {{if ne .UNFORMATTED ""}}
+        echo "❌ The following files need formatting:"
+        echo "{{.UNFORMATTED}}"
+        exit 1
+        {{else}}
+        echo "All files are properly formatted"
+        {{end}}
 
   lint:staticcheck:
     desc: Run staticcheck (install if needed)
@@ -304,22 +304,22 @@ tasks:
     aliases: [db]
     cmds:
       - |
-          docker build \
-            --build-arg VERSION={{.VERSION}} \
-            --build-arg BUILD_TIME={{.BUILD_TIME}} \
-            --build-arg GIT_COMMIT={{.GIT_COMMIT}} \
-            -t {{.APP_NAME}}:{{.VERSION}} \
-            -t {{.APP_NAME}}:latest \
-            .
+        docker build \
+          --build-arg VERSION={{.VERSION}} \
+          --build-arg BUILD_TIME={{.BUILD_TIME}} \
+          --build-arg GIT_COMMIT={{.GIT_COMMIT}} \
+          -t {{.APP_NAME}}:{{.VERSION}} \
+          -t {{.APP_NAME}}:latest \
+          .
       - >
-          echo "Docker image built: {{.APP_NAME}}:{{.VERSION}}"
+        echo "Docker image built: {{.APP_NAME}}:{{.VERSION}}"
 
   docker:build:dev:
     desc: Build development Docker image
     cmds:
       - docker build -f Dockerfile.dev -t {{.APP_NAME}}:dev .
       - >
-          echo "Development Docker image built: {{.APP_NAME}}:dev"
+        echo "Development Docker image built: {{.APP_NAME}}:dev"
 
   docker:run:
     desc: Run Docker container
@@ -426,7 +426,7 @@ tasks:
       - git tag -a v{{.VERSION}} -m "Release v{{.VERSION}}"
       - echo "Tagged v{{.VERSION}}"
       - >
-          echo "Push with: git push origin v{{.VERSION}}"
+        echo "Push with: git push origin v{{.VERSION}}"
 
   # Documentation tasks
   docs:serve: