[Fix] Fixes editor crash (Resolves #2604)

[rutvik110]

[Fix] Fixes editor crash (Resolves #2604)

The editor crash occuring during the placeholder insertion after an attributed text was result of a bug in markdown finder flow, findMarkdown within _UpstreamInlineMarkdownParser. The offset at which the placeholder was getting inserted, couple of places within the markdown finder were expecting a string at that offset but were receiving an instance of the placeholder resulting in a crash.

Fixed this by passing the plain text version of the attributedText before performing any operations that try to parse/work with the attributedText.

Demo:

Screen.Recording.2025-04-17.at.9.03.54.AM.mov

Remarks:

• Some of the pubspec.lock files have been updated as a result of pub get operations.

[rutvik110]

Notes on the newly added localization files:

This change is actually part of breaking changes to Flutter tooling which going forward won't generate the flutter_gen pacakge. Earlier, these package was used to store and import the generated symbols like localization files we see. But now, these generated files are supposed to be moved directly into the app source directory based on the configs set in l10n.yaml file.

That's why we've these new localization files showing up in the app directory on pub get on master. More details on the breaking change is here,
https://docs.flutter.dev/release/breaking-changes/flutter-generate-i10n-source

First seen in : Seen in master on v3.31.0-0.1.pre. Not yet released to stable.