fix(generate:locale): make the definition types extendible

[ST-DDT]

I messed up and removed code (#910), that was used by our scripts, so now I have to adjust the scripts to work without them.

We could revert that commit, but we want to get ride of it in the long run anyway.

I based this PR on #728 (#729) and adjusted the locale definitions to be Partial by default.
All usages were already partial and optional anyway:

faker/src/definitions/definitions.ts

Lines 45 to 54 in 7988464

	export type LocaleDefinition = {
	/**
	* The name of the language.
	*/
	title: string;
	separator?: string;
	} & {
	// Known modules
	[module in keyof Definitions]?: Partial<Definitions[module]>;
	} & {

I recommend, to review only the first commit/changes to the script and definitions as the second commit is only the execution of the script.

I will try to create a separate PR, that will check the scripts at least type wise (Issue #917).

[codecov]

Codecov Report

Merging #915 (f2bd56f) into main (f1dba1b) will decrease coverage by 0.01%.
The diff coverage is 81.34%.

@@            Coverage Diff             @@
##             main     #915      +/-   ##
==========================================
- Coverage   99.67%   99.66%   -0.02%     
==========================================
  Files        1957     1957              
  Lines      209768   209797      +29     
  Branches      885      885              
==========================================
  Hits       209084   209084              
- Misses        664      693      +29     
  Partials       20       20              

Impacted Files	Coverage Δ
src/definitions/address.ts	0.00% <0.00%> (ø)
src/definitions/animal.ts	0.00% <0.00%> (ø)
src/definitions/commerce.ts	0.00% <0.00%> (ø)
src/definitions/company.ts	0.00% <0.00%> (ø)
src/definitions/database.ts	0.00% <0.00%> (ø)
src/definitions/date.ts	0.00% <0.00%> (ø)
src/definitions/definitions.ts	0.00% <0.00%> (ø)
src/definitions/finance.ts	0.00% <0.00%> (ø)
src/definitions/hacker.ts	0.00% <0.00%> (ø)
src/definitions/index.ts	0.00% <0.00%> (ø)
... and 243 more