Adds a new Agent Skill - Acquire-Codebase-Knowledge (#1373)

* feat(skill): add acquire-codebase-knowledge skill documentation

* feat(templates): add architecture, concerns, conventions, integrations, stack, structure, and testing documentation templates

* feat(references): add inquiry checkpoints and stack detection documentation

* feat(scan): add script to collect project discovery information for acquire-codebase-knowledge skill

* feat(skills): add acquire-codebase-knowledge skill for codebase mapping and documentation

* feat(scan): enhance scan script with absolute path handling and improved output variable validation

* feat(scan): replace bash script with Python script for project discovery information collection

* feat(skills): update acquire-codebase-knowledge skill to replace scan.sh with scan.py

skills/acquire-codebase-knowledge/assets/templates/TESTING.md

@@ -0,0 +1,57 @@
+# Testing Patterns
+
+## Core Sections (Required)
+
+### 1) Test Stack and Commands
+
+- Primary test framework: [NAME + VERSION]
+- Assertion/mocking tools: [TOOLS]
+- Commands:
+
+```bash
+[run all tests]
+[run unit tests]
+[run integration/e2e tests]
+[run coverage]
+```
+
+### 2) Test Layout
+
+- Test file placement pattern: [co-located/tests folder/etc]
+- Naming convention: [pattern]
+- Setup files and where they run: [paths]
+
+### 3) Test Scope Matrix
+
+| Scope | Covered? | Typical target | Notes |
+|-------|----------|----------------|-------|
+| Unit | [yes/no] | [modules/services] | [notes] |
+| Integration | [yes/no] | [API/data boundaries] | [notes] |
+| E2E | [yes/no] | [user flows] | [notes] |
+
+### 4) Mocking and Isolation Strategy
+
+- Main mocking approach: [module/class/network]
+- Isolation guarantees: [what is reset and when]
+- Common failure mode in tests: [short note]
+
+### 5) Coverage and Quality Signals
+
+- Coverage tool + threshold: [value or TODO]
+- Current reported coverage: [value or TODO]
+- Known gaps/flaky areas: [list]
+
+### 6) Evidence
+
+- [path/to/test-config]
+- [path/to/representative-test-file]
+- [path/to/ci-or-coverage-config]
+
+## Extended Sections (Optional)
+
+Add only when needed:
+
+- Framework-specific suite patterns
+- Detailed mock recipes per dependency type
+- Historical flaky test catalog
+- Test performance bottlenecks and optimization ideas