Add html.yaml config and document testing requirements

Due to network limitations in the automated build environment, the
following steps could not be completed but are required per
contribution guidelines:

1. Build project: ./mvnw clean install -DskipTests
2. Regenerate samples: ./bin/generate-samples.sh bin/configs/html.yaml
3. Commit updated samples: git add samples/documentation/html/

Added:
- bin/configs/html.yaml: Configuration for html generator samples
- TESTING_STEPS.md: Detailed instructions for completing the PR

The template fix in bodyParam.mustache is complete and correct.
Sample regeneration is needed to verify the fix visually in the
generated HTML documentation.

Author: claude

TESTING_STEPS.md

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+# Testing Steps Required for HTML Generator Fix
+
+This document outlines the steps that need to be completed to finalize the HTML generator array type fix according to the contribution guidelines.
+
+## What Was Fixed
+
+Fixed the `bodyParam.mustache` template in `/modules/openapi-generator/src/main/resources/htmlDocs/` to properly display array types for request body parameters.
+
+**Before:** `User`
+**After:** `array[User]`
+
+## Steps to Complete (Due to Build Environment Limitations)
+
+The following steps could not be completed in the automated environment due to network restrictions preventing Maven from downloading dependencies:
+
+### 1. Build the Project
+
+```bash
+./mvnw clean install -DskipTests -Dmaven.javadoc.skip=true
+```
+
+This generates the `openapi-generator-cli.jar` needed for sample generation.
+
+### 2. Create HTML Generator Config (Already Done)
+
+Created `/bin/configs/html.yaml` with:
+```yaml
+generatorName: html
+outputDir: samples/documentation/html
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/htmlDocs
+additionalProperties:
+  hideGenerationTimestamp: "true"
+```
+
+### 3. Regenerate HTML Samples
+
+```bash
+./bin/generate-samples.sh bin/configs/html.yaml
+```
+
+This will update `/samples/documentation/html/index.html` with the fix.
+
+### 4. Verify the Fix
+
+Check that in `samples/documentation/html/index.html`, the `createUsersWithArrayInput` endpoint now shows:
+- Body parameter: `User array[User] (required)` instead of just `User (required)`
+
+Or similar array body parameters show the `array[TypeName]` format.
+
+### 5. Commit the Updated Samples
+
+```bash
+git add bin/configs/html.yaml
+git add samples/documentation/html/
+git commit -m "Add html.yaml config and update HTML samples after array type fix"
+```
+
+### 6. Optional: Run Tests
+
+```bash
+mvn verify -Psamples
+```
+
+### 7. Push All Changes
+
+```bash
+git push origin claude/fix-html-array-types-aPDDX
+```
+
+## Verification
+
+To verify the fix is working correctly, look for any endpoint in the generated HTML that has an array body parameter. For example, in the Petstore spec, the `/user/createWithArray` endpoint should show:
+
+```html
+<div class="param">user array[<a href="#User">User</a>] (required)</div>
+```
+
+Instead of:
+
+```html
+<div class="param">user <a href="#User">User</a> (required)</div>
+```
+
+## Current Status
+
+✅ Template fix committed
+✅ Config file created
+❌ Samples not regenerated (requires build)
+❌ Tests not run (requires build)
+
+The template fix is correct and ready, but sample regeneration is required to complete the PR per contribution guidelines.

bin/configs/html.yaml

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+generatorName: html
+outputDir: samples/documentation/html
+inputSpec: modules/openapi-generator/src/test/resources/3_0/petstore.yaml
+templateDir: modules/openapi-generator/src/main/resources/htmlDocs
+additionalProperties:
+  hideGenerationTimestamp: "true"