2323 vocabulary tags custom field

[entantoencuanto]

Closes #2323

✌️ What does this PR do?

• Adds a tags custom field type which allow the creation of terms of tags vocabulary on creation

Pending

• There is a known stale issue (Firefox crashes when tagging with non-ASCII characters (Chinese/Japanese, diacritics, unicode, etc) select2/select2#4743) that causes problems with the creation of tags when they have accents (The first character works fine with accents, but the following accents fails, observed not only in Firefox, also in Chrome and MacOS, Firefox crashes when tagging with non-ASCII characters (Chinese/Japanese, diacritics, unicode, etc) select2/select2#4743 (comment)).

I'll try to change the behaviour with the createTag callback of select2.

🔍 How should this be manually tested?

👀 Screenshots

Before this PR

🚫

After this PR

Does this PR changes any configuration file?

No

(Changes in these files might need to update the role in Ansible)

📖 Does this PR require updating the documentation?

No

[houndci-bot]

Unexpected console statement no-console

[codecov-io]

Codecov Report

Merging #2354 into master will decrease coverage by 0.02%.
The diff coverage is 27.27%.

@@            Coverage Diff             @@
##           master    #2354      +/-   ##
==========================================
- Coverage   81.32%   81.29%   -0.03%     
==========================================
  Files         678      678              
  Lines       17788    17796       +8     
==========================================
+ Hits        14466    14468       +2     
- Misses       3322     3328       +6

Impacted Files	Coverage Δ
...s/gobierto_common/custom_field_record_decorator.rb	75.75% <0%> (ø)	⬆️
...to_common/custom_field_value/vocabulary_options.rb	29.41% <0%> (-20.59%)	⬇️
app/models/gobierto_common/custom_field.rb	94.23% <100%> (+0.11%)	⬆️
...obierto_admin/gobierto_common/custom_field_form.rb	92.47% <100%> (ø)	⬆️
app/helpers/gobierto_budgets/application_helper.rb	61.45% <0%> (+1.04%)	⬆️

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[ferblape]

Tags with accents don't work very well, I haven't been able to create tags with accents even with your solution. I have been investigating but we need to go deeper.

[ferblape]

Tags with accents don't work very well, I haven't been able to create tags with accents even with your solution. I have been investigating but we need to go deeper.

But I'm mergin this to avoid branch conflicts.