Perform code optimization and document cleanup (#1)

## Summary
- add repository-wide quality tooling and verification scaffolding, including CI workflows, pnpm workspace setup, ESLint/Prettier/markdown checks, and generated-output verification helpers
- reorganize skill sources and generation flow by introducing canonical `_source` variants, generator/manifests, reusable helper abstractions, and shared web-automation/browser utilities
- clean up and expand documentation so the root README flows into docs and skill docs, with clearer development, reviewer, installer, and workflow guidance

## Notable changes
- docs flow and consistency cleanup across `README.md`, `docs/README.md`, and related docs
- new scripts for `check`, docs verification, generated-file verification, shell portability, and safe directory replacement
- refactors in Atlassian and web-automation skill runtimes to reduce duplication and centralize reusable code
- changelog, development documentation, and CI surface updates

## Test Plan
- [ ] `pnpm run check`
- [ ] review generated/manifests and skill sync outputs
- [ ] smoke-check docs flow from `README.md` to `docs/README.md` to skill docs

## Notes
- this branch currently includes tracked `skills/web-automation/shared/node_modules` content that should be reviewed carefully as potentially noisy/accidental committed artifacts

Co-authored-by: Stefano Fiorini <stefano.fiorini@firsthorizon.com>
Reviewed-on: #1

skills/create-plan/pi/templates/continuation-runbook.md

@@ -1,3 +1,4 @@
+<!-- ⚠️ GENERATED FILE – do not edit directly. Edit the canonical source in skills/create-plan/_source/pi/ and run `pnpm run sync:pi`. -->
 # Continuation Runbook: [Plan Title]
 
 ## Reference Files (START HERE)
@@ -65,15 +66,19 @@ Work from this folder (`ai_plan/YYYY-MM-DD-<short-title>/`) and always follow th
 ## Full Context Reproduction
 
 ### Project Overview
+
 [What this project/feature is about]
 
 ### User Requirements
+
 [All gathered requirements]
 
 ### Scope
+
 [In scope / out of scope]
 
 ### Dependencies
+
 [External dependencies, prerequisites, related systems]
 
 ---
@@ -81,16 +86,19 @@ Work from this folder (`ai_plan/YYYY-MM-DD-<short-title>/`) and always follow th
 ## Key Specifications
 
 ### Type Definitions
+
 ```typescript
 // Copy-paste ready type definitions
 ```
 
 ### Enums & Constants
+
 ```typescript
 // All enums/constants needed
 ```
 
 ### API Endpoints
+
 ```typescript
 // Request/response shapes
 ```
@@ -108,16 +116,19 @@ Work from this folder (`ai_plan/YYYY-MM-DD-<short-title>/`) and always follow th
 ## Verification Commands
 
 ### Lint (changed files first)
+
 ```bash
 # example: pnpm eslint <changed-file-1> <changed-file-2>
 ```
 
 ### Typecheck
+
 ```bash
 # example: pnpm tsc --noEmit
 ```
 
 ### Tests (target changed scope first)
+
 ```bash
 # example: pnpm test -- <related spec/file>
 ```