add documentation for ai agents (#3115)

* add documentation for ai agents

* docs: consolidate CLAUDE.md and CONTRIBUTING.md, add style guidelines

- Refactor CLAUDE.md to reference CONTRIBUTING.md for build/test/format info
- Expand CONTRIBUTING.md with comprehensive build targets, env vars, and testing
- Add code style guidelines section with conventional commits
- Standardize SDK prettier config to use single quotes (matching web)
- Add project-level Claude Code settings to disable co-author attribution

* style(sdk): apply prettier with single quotes

Run prettier across sdk/base and sdk/package to apply the
standardized quote style (single quotes matching web).

* docs: add USER.md for per-developer TODO filtering

- Add agents/USER.md to .gitignore (contains user identifier)
- Document session startup flow in CLAUDE.md:
  - Create USER.md if missing, prompting for identifier
  - Filter TODOs by @username tags
  - Offer relevant TODOs on session start

* docs: add i18n documentation task to agent TODOs

* docs: document i18n ID patterns in core/

Add agents/i18n-patterns.md covering rust-i18n setup, translation file
format, t!() macro usage, key naming conventions, and locale selection.
Remove completed TODO item and add reference in CLAUDE.md.

* chore: clarify that all builds work on any OS with Docker

sdk/base/lib/util/deepMerge.ts

@@ -23,7 +23,7 @@ export function partialDiff<T>(
     } else {
       return
     }
-  } else if (typeof prev === "object" && typeof next === "object") {
+  } else if (typeof prev === 'object' && typeof next === 'object') {
     if (prev === null || next === null) return { diff: next }
     const res = { diff: {} as Record<keyof T, any> }
     const keys = Object.keys(next) as (keyof T)[]
@@ -48,14 +48,14 @@ export function partialDiff<T>(
 
 export function deepMerge(...args: unknown[]): unknown {
   const lastItem = (args as any)[args.length - 1]
-  if (typeof lastItem !== "object" || !lastItem) return lastItem
+  if (typeof lastItem !== 'object' || !lastItem) return lastItem
   if (Array.isArray(lastItem))
     return deepMergeList(
       ...(args.filter((x) => Array.isArray(x)) as unknown[][]),
     )
   return deepMergeObject(
     ...(args.filter(
-      (x) => typeof x === "object" && x && !Array.isArray(x),
+      (x) => typeof x === 'object' && x && !Array.isArray(x),
     ) as object[]),
   )
 }