Fix build system project directory mismatch

[gerchowl]

Problem Description

The build system has a structural inconsistency where the project name doesn't match the actual source directory, causing build failures.

Current Behavior

• The Makefile defines PROJECT ?= technical-documentation (line 8)
• But the actual documentation source is in /workspace/docs/ directory
• The build-diagrams.py script expects the project directory at /workspace/technical-documentation/
• This causes the build to fail with: Error: project directory not found at /workspace/technical-documentation

Root Cause

There are three build-related directories:

1. /workspace/build/ - Used by Makefile for main project outputs ✅
2. /workspace/technical-documentation/build/ - Orphaned/unused directory ❌
3. /workspace/example/build/ - Used by Makefile for example project ✅

The inconsistency:

• Project name: technical-documentation
• Source directory: docs/
• Expected by scripts: technical-documentation/

Proposed Solution

Update the Makefile to use "docs" as the project name to match the actual directory structure:

• Change PROJECT ?= technical-documentation to PROJECT ?= docs
• Update the technical-documentation target to pass PROJECT=docs to build-project

This aligns the project name with the actual source directory location.

Files Affected

• /workspace/Makefile (lines 8, 46)

Impact

• Low risk: Only changes project name reference
• No changes to output file names or locations
• Diagrams will correctly compile from docs/diagrams/
• The orphaned technical-documentation/ folder can be safely removed in a follow-up