Telegram QR styling

[Jaskon]

Issue #1622

Changes:

• 1/1 aspect ratio
• white border around (for easier scan)

Before:

After:

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (07667c8) 58.63% compared to head (d244240) 58.63%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1647 +/- ## ======================================== Coverage 58.63% 58.63% ======================================== Files 128 128 Lines 2877 2877 Branches 730 695 -35 ======================================== Hits 1687 1687 - Misses 1065 1186 +121 + Partials 125 4 -121 ``` [see 24 files with indirect coverage changes](https://app.codecov.io/gh/umputun/remark42/pull/1647/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Umputun)

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.

[Jaskon]

What is the Size limit error about? Do I need to open some permissions in my fork to fix that?

[paskal]

Can you please post screenshots before and after the change? As for the size limit, it's defined here so you need to alter it in this PR.