SPRINT #2 ISSUE 3: Build system simplification - reduce complexity barriers preventing user adoption

[krystophny]

SCOPE: Simplify build system to remove insurmountable barriers for new users identified in PLAY audit

COMPLEXITY REDUCTION TARGETS:

• Streamline fmp.toml configuration eliminating unnecessary complexity
• Reduce Makefile targets from current maze to essential commands only
• Consolidate dependency declarations removing redundant specifications
• Eliminate build artifact contamination preventing clean builds

SUCCESS CRITERIA:

• Single command build: 'fpm build' works for all users
• Single command test: 'fmp test' executes full test suite
• Clean builds: No artifact contamination between builds
• Documentation match: Build instructions reflect actual simplicity

VERIFICATION:

• Fresh clone → 'fpm build' succeeds immediately
• Clean environment → 'fpm test' passes all tests
• Multiple builds → no artifact conflicts
• User workflow → matches documented simplicity

USER IMPACT:
Removes barriers to adoption identified in user experience audit

REFERENCES: Addresses issues #974, #971, #975 build complexity components

[krystophny]

Closing sprint epic; track via specific actionable tickets.