feat: add support for global inject options

[pimlie]

See the added docs.

This pr doesnt fix anything, just provides a (possible) cleaner API to integrators.

[codecov]

Codecov Report

Merging #568 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #568   +/-   ##
=======================================
  Coverage   98.68%   98.68%           
=======================================
  Files          33       33           
  Lines         684      687    +3     
  Branches      211      212    +1     
=======================================
+ Hits          675      678    +3     
  Misses          5        5           
  Partials        4        4           

Impacted Files	Coverage Δ
src/server/generateServerInjector.js	100.00% <100.00%> (ø)
src/server/generators/attribute.js	100.00% <100.00%> (ø)
src/server/generators/tag.js	100.00% <100.00%> (ø)
src/server/inject.js	100.00% <100.00%> (ø)
src/shared/$meta.js	100.00% <100.00%> (ø)

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