sync(bfmono): chore(gambit): cut 0.8.5-rc.10 (+19 more) (bfmono@f5920ef86)

This PR is an automated gambitmono sync of bfmono Gambit packages.

- Source: `packages/gambit/`
- Core: `packages/gambit/packages/gambit-core/`
- bfmono rev: f5920ef86

Changes:
- f5920ef86 chore(gambit): cut 0.8.5-rc.10
- 073c84d0e chore(gambit): cut 0.8.5-rc.10
- 2c669ba51 fix(gambit-core): ship builtin snippets/decks in npm runtime layouts
- 498708844 docs(gambit): retire synthetic respond/end guidance and align deck authoring surfaces
- 35ad1d5b5 feat(gambit-core): add OpenResponses convergence runtime, extensions, and async action semantics
- b2d78cfb3 chore(gambit): cut 0.8.5-rc.9
- a0029f933 revert(gambit-ci): restore shell-based nix develop in ci-gambit-core
- 1b2930064 fix(gambit-ci): create nix profile parent dir in ci-gambit-core
- 168538d09 chore(gambit): cut 0.8.5-rc.8
- 9f2dd2186 Switch ci-gambit-core to run nix develop via step commands with a profile instead of custom shell overrides. This avoids both workflow-parse failures and literal  path resolution failures.
- bd91e87f1 chore(gambit): cut 0.8.5-rc.7
- 63a27a8a4 fix(gambit-ci): stop using github.workspace in shell field
- e923eabdd chore(gambit): cut 0.8.5-rc.6
- b6f5d2c1f feat(gambit): add workbench composer chip and chat flow updates
- 9ebc474b8 fix(gambit): invalidate build deck label cache on frontmatter changes
- 04f032d28 feat(simulator-ui): use icon remove action for error context chip
- 71a94654b fix(gambit): validate explicit deck path and stabilize stop test
- 77fa7f139 refactor(gambit-simulator-ui): replace placeholders with reusable callout
- d90d57c08 feat(gambit-simulator-ui): send scenario run errors to workbench chat
- dc7d93a08 refactor(gambit): Fix left drawer

Do not edit this repo directly; make changes in bfmono and re-run the sync.

Author: bft-codebot

CHANGELOG.md

@@ -11,7 +11,10 @@ since = "f9185fb1967a31e92a4a26dbb94cfe1322148406"
 
 ## v0.8.5-rc.10
 
-- TBD
+- #4004: add OpenResponses convergence runtime + extensions + async action
+  semantics in gambit-core.
+- #4004: retire synthetic respond/end docs and align deck authoring guidance.
+- #4010: fix gambit-core npm runtime layouts to ship built-in snippets/decks.
 
 ## v0.8.5-rc.9