DOC-3243: Add new exportpdf v2 converter documentation.

[kemister85]

Ticket: DOC-3243

Site: Staging branch

Changes:

New pages

• exportpdf-v2.adoc – Export to PDF v2 plugin page
• html-to-pdf-converter-api-v2.adoc – HTML to PDF Converter API v2
• export-to-pdf-v2-with-jwt-authentication-nodejs.adoc – JWT Node.js v2 guide
• export-to-pdf-v2-with-jwt-authentication-php.adoc – JWT PHP v2 guide

Configuration

• exportpdf_converter_options_v2.adoc – v2 converter options (document, headers/footers, metadata, etc.)
• exportpdf_converter_options_v1.adoc – v1 options (split from shared partial)
• exportpdf.adoc – updated for v1, links to v2

Live demo

• exportpdf-v2 demo with v2 config (document, metadata, keywords as array)

Navigation

• Export to PDF split into v1 and v2 sections with API and JWT guides

Fixes

• JWT links on v2 page point to v2 guides (pluginfilename: export-to-pdf-v2)
• exportpdf_token_provider xref points to v2 page
• Removed redundant "version 2" wording on v2 page
• Simplified v2 options partial to avoid duplication with API docs

Pre-checks:

• Branch prefixed with feature/<version>/, hotfix/<version>/, staging/<version>/, or release/<version>/.
• modules/ROOT/nav.adoc has been updated (if applicable).
• Included a release note entry for any New product features.
• If this is a minor release, updated productminorversion in antora.yml and added new supported versions entry in modules/ROOT/partials/misc/supported-versions.adoc.

Review:

• Documentation Team Lead has reviewed

[kemister85]

• Revert before merging- only used for demo testing

Suggested change

	tinymce_live_demo_url: https://cdn.tiny.cloud/1/qagffr3pkuv17a8on1afax661irst1hbr4e6tbv888sz91jc/tinymce/8-dev/tinymce.min.js
	tinymce_live_demo_url: https://cdn.tiny.cloud/1/qagffr3pkuv17a8on1afax661irst1hbr4e6tbv888sz91jc/tinymce/8/tinymce.min.js