✨ Member Counter template helpers

[ronaldlangeveld]

ref https://github.com/TryGhost/Team/issues/1667

Introducing 2 new helper handlebars tags, {{total_members}} and {{total_paid_members}} ideal for Member Sites who want to display these metrics to incentivise users to upgrade.

[codecov]

Codecov Report

Merging #15013 (ab9046e) into main (d65aa08) will increase coverage by 0.03%.
The diff coverage is 78.31%.

@@            Coverage Diff             @@
##             main   #15013      +/-   ##
==========================================
+ Coverage   61.07%   61.10%   +0.03%     
==========================================
  Files         593      596       +3     
  Lines       47557    47640      +83     
  Branches     4271     4290      +19     
==========================================
+ Hits        29045    29110      +65     
- Misses      18463    18481      +18     
  Partials       49       49              

Impacted Files	Coverage Δ
core/frontend/helpers/total_paid_members.js	62.50% <62.50%> (ø)
core/frontend/helpers/total_members.js	64.70% <64.70%> (ø)
core/frontend/utils/member-count.js	88.00% <88.00%> (ø)

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[allouis]

Looks good - only thing is the comments at the top of the helpers files, which are weird - but they do follow existing patterns ☺️

Am not fussed if they stay or go