Draw Rectangle default values

[root00198]

There are no default values set for endx and endy in Draw Rectangle Module. In this PR I set thoses values as 10px as default.
Perviously, There will no rectangle by default. But now, There will be a rectangle(square) of 10x10 pixels.
BEFORE SETTING DEFAULTS

AFTER SETTING DEFAULTS

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• Insert-step functionality is working correct as expected.

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[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (main@cfdbdad). Click here to learn what that means.
The diff coverage is 41.17%.

@@           Coverage Diff           @@
##             main    #1443   +/-   ##
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  Coverage        ?   66.62%           
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  Files           ?      129           
  Lines           ?     2661           
  Branches        ?      428           
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  Hits            ?     1773           
  Misses          ?      888           
  Partials        ?        0

Impacted Files	Coverage Δ
src/modules/Blend/Module.js	61.01% <41.17%> (ø)

[root00198]

@publiclab/is-reviewers

[jywarren]

Hi, sorry but could you resolve the conflicts? Thank you!

[root00198]

@jywarren, could you please review it...

[jywarren]

Great work, thank you!