feat: fix native agent update logic and automate release documentation (#52)

* fix: update native workflow to stop failing

* feat: add automated docs PR to release workflow

* fix: updated permissions in update-documentation workflow

Author: diegomtz5

.github/scripts/generate-docs.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+# --- 1. REQUIRE VERSION ---
+if [ -z "$PASSED_VERSION" ]; then
+    echo "::error::PASSED_VERSION missing"
+    exit 1
+fi
+
+VERSION=$PASSED_VERSION
+
+# --- 2. PARSE CHANGELOG.MD ---
+# 1. Finds the header matching '## VERSION'
+# 2. Collects everything until it hits the NEXT '## ' followed by a number
+# 3. This handles the double-hash format used in your Unity changelog
+RELEASE_NOTES=$(awk "/^## ${VERSION}/{flag=1;next} /^## [0-9]/{flag=0} flag" CHANGELOG.md)
+
+# Clean up: Remove empty lines and format bullets
+# Ensures lines starting with '-' become '* '
+IMPROVEMENTS=$(echo "$RELEASE_NOTES" | grep "^-" | sed 's/^- /* /')
+
+# Fallback if no specific improvements found
+if [ -z "$IMPROVEMENTS" ]; then
+    IMPROVEMENTS="* Updated native agent dependencies."
+fi
+
+# --- 3. CREATE THE MDX ---
+RELEASE_DATE=$(date +%Y-%m-%d)
+# Unity uses GitHub releases as the primary distribution link
+FINAL_DOWNLOAD_URL="${REPO_URL}/releases/tag/v${VERSION}"
+
+cat > "release-notes.mdx" << EOF
+---
+subject: ${AGENT_TITLE}
+releaseDate: '${RELEASE_DATE}'
+version: ${VERSION}
+downloadLink: '${FINAL_DOWNLOAD_URL}'
+---
+
+## Improvements
+
+${IMPROVEMENTS}
+EOF
+
+# --- 4. EXPORT CONTRACT ---
+echo "FINAL_VERSION=$VERSION" > release_info.env
+
+echo "✅ Generated release-notes.mdx for version $VERSION"