* chore: update Flutter SDK to version 3.38.5
Upgrade Flutter from 3.32.4 to 3.38.5 to meet awesome_lints
requirement for Dart SDK 3.10.0+. Update CI workflow to use
the new Flutter version and add custom_lint verification step.
* chore: integrate awesome_lints with custom lint rules
Add awesome_lints and custom_lint dependencies, configure
analysis_options.yaml to enable newline lint rules: newline_before_case,
newline_before_constructor, newline_before_method, and newline_before_return.
* style: apply newline formatting per awesome_lints rules
Add blank lines before case clauses, return statements, method
declarations, and constructors throughout the codebase to comply
with awesome_lints newline rules.
* fix: replace deprecated translate with leftTranslateByDouble
Update Matrix4.translate() calls to use the new leftTranslateByDouble()
API to resolve deprecation warnings in Flutter SDK 3.38.5.
* chore: improve code readability with blank line formatting
* fix: copy handler migrated to latest api
* flutter analyze
* code formatted
* fix: test added for copy handler
* more test added for copy handler
* fix:write test for copy handler
* text added for html to nodes
* fix: added more test for html encoder
* fix:removed unused imports
* fix: copyhandler collapse state test added
* added direct event handler in test
* flutter analyze
* revert changes in example.json
* change toolbar and added export so developer can modify according to its need
* revert some chages from examples
* html to document convertion added
* test added
* code formated
* node to html added image parameter
* toolbar color and elevation added in editor stylee
* code formated
* remove duplicated exports
* fix test improts and formating
