Add databases repos

[ndelangen]

Issue:

What I did

ADD 2 more misc repos:
lib/database & lib/database-local

I'm not sure what these are for and wether we want to continue working with / on them.

Addon comments uses this for persistence, but I guess any addon could want persistence..

How to test

run unit tests

[codecov]

Codecov Report

Merging #1145 into master will decrease coverage by 0.43%.
The diff coverage is 5.29%.

@@            Coverage Diff             @@
##           master    #1145      +/-   ##
==========================================
- Coverage   12.75%   12.32%   -0.44%     
==========================================
  Files         199      206       +7     
  Lines        4571     4805     +234     
  Branches      724      748      +24     
==========================================
+ Hits          583      592       +9     
- Misses       3347     3549     +202     
- Partials      641      664      +23

Impacted Files	Coverage Δ
lib/database-local/src/shared/database.js	0% <0%> (ø)
lib/database-local/src/server/middleware.js	0% <0%> (ø)
lib/database-local/src/client/bundledPersister.js	0% <0%> (ø)
...ib/database-local/src/client/devServerPersister.js	0% <0%> (ø)
lib/database-local/src/client/index.js	0% <0%> (ø)
lib/database/dist/index.js	0% <0%> (ø)
lib/database/src/index.js	100% <100%> (ø)
... and 4 more

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[tmeasday]

Unsurprisingly, the comments addon does not currently work. See #1190