Remove dependencies on external assets

[rvveber]

OpenDesk promises to be digitally sovereign.
As such, apps in it should not depend on external sources that could potentially track users.

For Docs it would be nice if it didn't rely on external digital assets.
And supplied all required assets itself.

Currently we noticed these occasions, that could be optimized:

• Fonts are beeing queried from google directly
  

  docs/src/frontend/apps/impress/src/cunningham/cunningham-style.css

  Lines 80 to 104 in 6cc4263

  	@font-face {
  	font-family: Inter;
  	font-style: italic;
  	font-weight: 100 900;
  	font-display: swap;
  	src: url('https://fonts.gstatic.com/s/inter/v18/UcCm3FwrK3iLTcvnUwQT9g.woff2')
  	format('woff2');
  	unicode-range:
  	U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
  	U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
  	U+2215, U+FEFF, U+FFFD;
  	}
  	@font-face {
  	font-family: Inter;
  	font-style: normal;
  	font-weight: 100 900;
  	font-display: swap;
  	src: url('https://fonts.gstatic.com/s/inter/v18/UcCo3FwrK3iLTcviYwY.woff2')
  	format('woff2');
  	unicode-range:
  	U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
  	U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
  	U+2215, U+FEFF, U+FFFD;
  	}

---

• Fonts are beeing queried from google directly
  

  docs/src/mail/mjml/partial/header.mjml

  Lines 11 to 19 in 6cc4263

  	<mj-attributes>
  	<mj-font name="Roboto" href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;700;900&display=swap" />
  	<mj-all
  	font-family="Roboto, -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif"
  	font-size="16px"
  	line-height="normal"
  	color="#3A3A3A"
  	/>
  	</mj-attributes>

---

• The PDF Exporter uses the default source (twemoji from cloudflare CDN)
  https://github.com/TypeCellOS/BlockNote/blob/ac38a1b12b3924d20d274a1c6de2a9ecb4488ba6/packages/xl-pdf-exporter/src/pdf/pdfExporter.tsx#L32-L38
  • Can be fixed by specifying option emojiSource next to resolveFileUrl in
    

    docs/src/frontend/apps/impress/src/features/docs/doc-export/components/ModalExport.tsx

    Lines 96 to 98 in 6cc4263

    	const exporter = new PDFExporter(editor.schema, pdfDocsSchemaMappings, {
    	resolveFileUrl: async (url) => exportCorsResolveFileUrl(doc.id, url),
    	});

---