Greek language support added.

[goten002]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ng-alain/delon/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[codecov-io]

Codecov Report

Merging #423 into master will increase coverage by 0.34%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #423      +/-   ##
==========================================
+ Coverage   97.27%   97.62%   +0.34%     
==========================================
  Files         257      258       +1     
  Lines        7257     6727     -530     
  Branches     1073      681     -392     
==========================================
- Hits         7059     6567     -492     
+ Misses        125      120       -5     
+ Partials       73       40      -33

Impacted Files	Coverage Δ
packages/theme/src/locale/languages/el-GR.ts	100% <100%> (ø)
packages/theme/src/locale/public_api.ts	100% <100%> (ø)	⬆️
packages/form/src/widgets/rate/rate.widget.ts	86.66% <0%> (-0.84%)	⬇️
packages/form/src/widgets/number/number.widget.ts	95.65% <0%> (-0.78%)	⬇️
...kages/form/src/widgets/cascader/cascader.widget.ts	82.14% <0%> (-0.62%)	⬇️
packages/form/src/widgets/array/array.widget.ts	94.73% <0%> (-0.51%)	⬇️
packages/form/src/widgets/object/object.widget.ts	92.85% <0%> (-0.48%)	⬇️
packages/form/src/widgets/upload/upload.widget.ts	95.65% <0%> (-0.19%)	⬇️
...kages/form/src/widgets/checkbox/checkbox.widget.ts	92% <0%> (-0.16%)	⬇️
...rm/src/widgets/autocomplete/autocomplete.widget.ts	97.77% <0%> (-0.14%)	⬇️
... and 97 more

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[cipchk]

The fileName value can'n be used, unless provided language pack for ng-alain scaffolding.

[cipchk]

@goten002 Hi, can you fix this?

[goten002]

@goten002 Hi, can you fix this?

Hello, I just pulled the translated file!