Athas v0.9.1-preview.1

• Codify reusable workbench UI conventions by @mehmetozguldev in f0636f3
• Unify editor and terminal tab interactions by @mehmetozguldev in 1eb2082
• Make fullscreen workbench surfaces edge to edge by @mehmetozguldev in 1a25855
• Refine Monaco scrolling and sticky chrome by @mehmetozguldev in 95e1e83
• Restore command palette keyboard navigation by @mehmetozguldev in eda89e1
• Centralize product and service configuration by @mehmetozguldev in f280ed8
• Pin release workflow toolchains by @mehmetozguldev in 7ea0d20
• Persist file-open benchmark traces by @mehmetozguldev in 2fc4127
• Add shared action and avatar primitives by @mehmetozguldev in ca66e54
• Standardize Git command forms by @mehmetozguldev in 9b68ce2
• Refine editor and diff navigation by @mehmetozguldev in 918c011
• Simplify GitHub review surfaces by @mehmetozguldev in f145c98
• Refresh the Athas theme palette by @mehmetozguldev in 583909f
• Unify transparent workbench chrome by @mehmetozguldev in fe6815f
• Constrain tab dragging to tab axes by @mehmetozguldev in 8031d17

Full Changelog: v0.9.0...v0.9.1-preview.1