fix(viewer): hash all parameters before sending get showimage request

[icaparros-at-wiris]

Description

Formulas are cached including parameters: centerbaseline, metrics, and lang. However, the new Viewer is not hashing these parameters before initiating the showImage Get request. Consequently, the generated Hash does not align with the Hash saved in the cache by Integration Services. This inconsistency leads to the cache being ignored by the viewer.

Steps to reproduce

1. Add next mathml on the body of html-integrations/packages/viewer/infex.html:

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>x</mi><mo>=</mo><mfrac><mrow><mo>-</mo><mi>b</mi><mo>&#177;</mo><msqrt><msup><mi>b</mi><mn>2</mn></msup><mo>-</mo><mn>4</mn><mi>a</mi><mi>c</mi></msqrt></mrow><mrow><mn>2</mn><mi>a</mi></mrow></mfrac></math>

2. Build the viewer using command nx build viewer
3. Open index.html nx serve viewer
4. On the Inspector > Network Tab just will appear a showImage request with the hash e16131cb25b408479febbfa0183a4478

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#taskid 42679