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/STACK.md

@@ -0,0 +1,56 @@
+# Technology Stack
+
+## Core Sections (Required)
+
+### 1) Runtime Summary
+
+| Area | Value | Evidence |
+|------|-------|----------|
+| Primary language | [VALUE] | [FILE_PATH] |
+| Runtime + version | [VALUE] | [FILE_PATH] |
+| Package manager | [VALUE] | [FILE_PATH] |
+| Module/build system | [VALUE] | [FILE_PATH] |
+
+### 2) Production Frameworks and Dependencies
+
+List only high-impact production dependencies (frameworks, data, transport, auth).
+
+| Dependency | Version | Role in system | Evidence |
+|------------|---------|----------------|----------|
+| [NAME] | [VERSION] | [ROLE] | [FILE_PATH] |
+
+### 3) Development Toolchain
+
+| Tool | Purpose | Evidence |
+|------|---------|----------|
+| [TOOL] | [LINT/FORMAT/TEST/BUILD] | [FILE_PATH] |
+
+### 4) Key Commands
+
+```bash
+[install command]
+[build command]
+[test command]
+[lint command]
+```
+
+### 5) Environment and Config
+
+- Config sources: [LIST FILES]
+- Required env vars: [VAR_1], [VAR_2], [TODO]
+- Deployment/runtime constraints: [SHORT NOTE]
+
+### 6) Evidence
+
+- [path/to/manifest]
+- [path/to/runtime-config]
+- [path/to/build-or-ci-config]
+
+## Extended Sections (Optional)
+
+Add only when needed for complex repos:
+
+- Full dependency taxonomy by category
+- Detailed compiler/runtime flags
+- Environment matrix (dev/stage/prod)
+- Process manager and container runtime details