docs(platform): add Program (OWASP SAMM) page

[eduardoconviso]

Summary

New documentation page for the Program module backed by OWASP SAMM v2, covering the features delivered in:

• Backend: convisoappsec/platform-backend#12694
• Frontend: convisoappsec/platform-frontend#2569

Adds docs/platform/program-samm.md and registers it under Platform Features → Platform User Guide in sidebars.js (between Threat Modeling and User Management).

Sections covered

• Overview + OWASP SAMM primer (5 BFs, 15 practices, Stream A/B, levels 0–3)
• Program Charter (scope, current/target maturity, risk appetite slider 0–100 → Low/Moderate/High/Critical, review cycle, reference assessment)
• Program Assets (associate/remove)
• SAMM Assessments — manual + Excel/CSV import
• Dual-radar (BF 5-axis + Practice 15-axis) and Stream A/B scoring table
• Initiatives (per-practice, Stream A enforcement, project association)
• Roadmap (gap, priority badges Critical/High/Medium/Low, initiative mapping)
• PTT (Percent to Target) + PTD (Progress to Date) explanation
• Program Report (PDF, EN/PT)
• Typical workflow + related areas

Missing pieces — screenshots to add

Doc references image paths but the files are not yet committed. Please drop the captures below into static/img/platform/ (light mode, ~1400px wide PNG, real assessment data so radars are non-trivial):

Filename	Capture
program-overview.png	Program workspace landing — tabs visible (Charter / Assets / Assessments / Initiatives / Roadmap / Report)
program-charter.png	Charter form filled — scope, current/target maturity badges, review cycle
program-risk-appetite.png	Risk appetite slider with zone indicators + label
program-assets.png	Assets tab with rows + Associate Asset dialog open
program-import-samm.png	ImportSammDialog with file picker / sample selected
program-assessment-panel.png	SammAssessmentPanel — BF 5-axis radar + Practice 15-axis radar + Stream A/B bars table
program-assessment-answers.png	SammAssessmentViewPage with per-question answers
program-initiatives.png	InitiativesPanel with PracticeInitiativeCard groups + AssociateProjectDialog open
program-roadmap.png	RoadmapPanel with priority badges + initiative mapping
program-report-dialog.png	ProgramReportDialog with EN/PT language toggle

Test plan

• yarn start — page renders under Platform Features → Platform User Guide → Program (SAMM)
• Internal links resolve (Asset Management, Projects, Requirements, Posture, AppSec Manager Guide)
• After screenshots are added, all ![]() references load
• No build warnings about broken image paths once screenshots land

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