Docs: banner we-are-hiring

[sequba]

Context

Adding "we are hiring" info to:

• vuepress docs page
• GH readme

Checklist:

• I have reviewed the guidelines about Contributing to HyperFormula and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement.
• My change is compliant with the OpenDocument standard.
• My change is compatible with Microsoft Excel.
• My change is compatible with Google Sheets.
• I described my changes in the CHANGELOG.md file.
• My changes require a documentation update.
• My changes require a migration guide.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.17%. Comparing base (0151983) to head (5f013e1).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1595   +/-   ##
========================================
  Coverage    97.17%   97.17%           
========================================
  Files          170      170           
  Lines        14747    14747           
  Branches      3236     3236           
========================================
  Hits         14330    14330           
  Misses         409      409           
  Partials         8        8           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

Performance comparison of head (5f013e1) vs base (0151983)

                                     testName |   base |   head | change
------------------------------------------------------------------------
                                      Sheet A | 509.07 | 527.48 | +3.62%
                                      Sheet B | 167.14 |  168.3 | +0.69%
                                      Sheet T | 146.15 | 147.84 | +1.16%
                                Column ranges | 505.06 | 502.71 | -0.47%
Sheet A:  change value, add/remove row/column |   14.5 |  14.85 | +2.41%
 Sheet B: change value, add/remove row/column |  134.2 | 133.45 | -0.56%
                   Column ranges - add column |  145.6 | 143.93 | -1.15%
                Column ranges - without batch | 433.12 | 440.13 | +1.62%
                        Column ranges - batch | 116.04 | 117.85 | +1.56%