feat(template): add a default preload script

[malept]

• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project follows, as appropriate.
• The changes are appropriately documented (if applicable).
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

Adds a preload script to every template. This is particularly useful for the Webpack templates, as it's not particularly obvious how to add a preload script with the magic constants (nor is it very easy to document).

[codecov]

Codecov Report

Merging #2722 (08d998b) into master (ba75c0b) will decrease coverage by 0.37%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2722      +/-   ##
==========================================
- Coverage   64.09%   63.71%   -0.38%     
==========================================
  Files          77       77              
  Lines        2607     2748     +141     
  Branches      584      682      +98     
==========================================
+ Hits         1671     1751      +80     
- Misses        753      813      +60     
- Partials      183      184       +1     

Impacted Files	Coverage Δ
packages/template/base/src/BaseTemplate.ts	87.09% <100.00%> (+4.95%)	⬆️
...ypescript-webpack/src/TypeScriptWebpackTemplate.ts	100.00% <100.00%> (ø)
...ages/template/typescript/src/TypeScriptTemplate.ts	100.00% <100.00%> (ø)
packages/template/webpack/src/WebpackTemplate.ts	100.00% <100.00%> (ø)
packages/api/core/src/api/init-scripts/init-git.ts	70.58% <0.00%> (-15.13%)	⬇️
packages/maker/base/src/Maker.ts	56.14% <0.00%> (-7.13%)	⬇️
packages/utils/async-ora/src/ora.ts	54.05% <0.00%> (-6.56%)	⬇️
packages/api/core/src/api/make.ts	58.82% <0.00%> (-5.94%)	⬇️
...ges/api/core/src/api/init-scripts/find-template.ts	74.07% <0.00%> (-5.93%)	⬇️
packages/utils/async-ora/src/ora-handler.ts	71.11% <0.00%> (-5.82%)	⬇️
... and 28 more

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