feat: add workspace files to chat from Files and Changes

* feat(app): open changed files from context menu

* fix(app): preserve changed-file row behavior

* feat(app): add changed files to open chats

* feat(app): share file actions across explorer and changes

* feat(app): attach workspace files to focused chat

* feat(app): drag workspace files into chat

* refactor(app): use file actions menu for changed files

* fix(app): open changed-file actions on right click

* test(app): cover direct file attachment flow

* fix(app): enable add to chat on native

* fix(app): align workspace file pane rows

* refactor(app): simplify workspace file attachments

* fix(app): preserve uploaded file draft attachments

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/app/src/components/tree-primitives.tsx

@@ -11,6 +11,7 @@ import { inlineUnistylesStyle } from "@/styles/unistyles-inline-style";
 // indentation, guide lines, and chevron. Keep those here so the two trees can't
 // drift apart.
 export const TREE_INDENT_PER_LEVEL = 16;
+export const WORKSPACE_FILE_ROW_VERTICAL_PADDING = SPACING[1.5];
 
 /** Left padding for a tree row at `depth`. Shared by folder rows and file headers
  * in the Changes tree so their indentation can't drift apart. */