init: Euro-Office Odoo 16.0 modules

Based on onlyoffice_odoo by Ascensio System SIA (ONLYOFFICE, LGPL-3).
Rebranded and adapted for Euro-Office by bring.out d.o.o.

Modules:
- eurooffice_odoo: base integration
- eurooffice_odoo_templates: document templates
- eurooffice_odoo_oca_dms: OCA DMS integration (replaces Enterprise documents)

All references renamed: onlyoffice -> eurooffice, ONLYOFFICE -> Euro-Office.
Original copyright notices preserved.

odoo-bringout-eurooffice-eurooffice_odoo/eurooffice_odoo/static/description/index.html

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+<section class="oe_container">
+  <div class="oe_row oe_spaced">
+    <h2 class="oe_slogan">
+      Edit and collaborate on office files within Odoo Documents
+    </h2>
+    <div class="oe_span12">
+      <span class="text-center">
+        <p class="oe_mt32">
+          Work with office documents uploaded in Odoo using Euro-Office Docs. <br />
+          <i>*In any Odoo section where you can upload/attach files</i>
+        </p>
+      </span>
+    </div>
+  </div>
+</section>
+
+<section class="oe_container">
+  <div class="oe_row">
+    <div class="oe_span12">
+      <h6>Edit attached deal notes in the Sales section</h6>
+    </div>
+
+    <div class="oe_span12">
+      <div class="oe_demo oe_picture1 oe_screenshot">
+        <img src="sales_section.png" />
+      </div>
+    </div>
+  </div>
+</section>
+
+<section class="oe_container mt-5">
+  <div class="oe_row">
+    <div class="oe_span12">
+      <h6>Open chat attachments in the Discuss section</h6>
+    </div>
+
+    <div class="oe_span12">
+      <div class="oe_demo oe_screenshot">
+        <img src="discuss_section.png" />
+      </div>
+    </div>
+  </div>
+</section>
+
+<section class="oe_container mt-5">
+  <div class="oe_row">
+    <div class="oe_span12">
+      <h5>Features and file formats</h5>
+    </div>
+
+    <div class="oe_span12">
+      <ul>
+        <li>Edit text documents, spreadsheets, and presentations (DOCX, XLSX, PPTX)</li>
+        <li>Collaborate on documents with your colleagues in real time</li>
+        <li>Edit form templates in PDF</li>
+        <li>Read PDF files</li>
+        <li>
+          Open other office file formats for viewing, including RTF, TXT, CSV, etc.
+        </li>
+      </ul>
+
+      <div class="oe_demo oe_screenshot">
+        <img src="document.png" />
+      </div>
+    </div>
+  </div>
+</section>