Remove warnings2

[joamatab]

• add gf.c.text_klayout
• remove cell decorator
• flatten taper
• flatten grating_coupler_rectangular
• run clean_value_json for netlists and Component.to_dict()

[sourcery-ai]

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[codecov]

Codecov Report

Attention: Patch coverage is 79.16667% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 68.33%. Comparing base (9812c5a) to head (223cc4b).
Report is 6 commits behind head on main.

Files	Patch %	Lines
gdsfactory/components/text.py	76.92%	2 Missing and 1 partial ⚠️
gdsfactory/pdk.py	50.00%	3 Missing ⚠️
gdsfactory/component.py	71.42%	2 Missing ⚠️
gdsfactory/cross_section.py	50.00%	1 Missing ⚠️
gdsfactory/difftest.py	50.00%	1 Missing ⚠️
gdsfactory/get_factories.py	50.00%	1 Missing ⚠️
gdsfactory/path.py	50.00%	1 Missing ⚠️
gdsfactory/read/from_gdspaths.py	50.00%	1 Missing ⚠️
gdsfactory/symbols.py	0.00%	1 Missing ⚠️
gdsfactory/write_cells.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2816      +/-   ##
==========================================
+ Coverage   68.24%   68.33%   +0.09%     
==========================================
  Files         300      300              
  Lines       15596    15592       -4     
  Branches     2277     2276       -1     
==========================================
+ Hits        10643    10655      +12     
+ Misses       4357     4342      -15     
+ Partials      596      595       -1     

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