feature/MM/437-development_onboarding_doc

[SCHsebastian]

Fixes - [Jira-#Issue_Number](https://mifosforge.jira.com/browse/MM-)

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Before	After

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Summary by CodeRabbit

• New Features

  • Added language selection to the onboarding flow so users can choose their onboarding language.

• Documentation

  • Added onboarding architecture and workflow docs, including dependency maps and sequence/flow diagrams.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[coderabbitai]

Walkthrough

Adds onboarding-language documentation and a new SetOnboardingLanguageViewModel to manage onboarding language selection, subscription to repository language changes, persistence of chosen language, UI state updates, and internal action/event/state scaffolding.

Changes

Cohort / File(s)	Summary
Documentation feature/onboarding-language/README.md	Adds onboarding-language README with dependency graph image, Mermaid sequence diagram for onboarding language flow, and architecture diagram outlining UI, domain, and data layers.
ViewModel / Onboarding language logic feature/onboarding-language/src/commonMain/kotlin/org/mifos/mobile/feature/onboarding/language/SetOnboardingLanguageViewModel.kt	Adds SetOnboardingLanguageViewModel: initializes default state, subscribes to repository language changes, handles user language selection by persisting choice, updates UI state, disables onboarding/first-time flags, and introduces OnboardingLanguageState, OnboardingLanguageEvent, and OnboardingLanguageAction scaffolding.

Sequence Diagram(s)

sequenceDiagram
    participant UI as UI Layer
    participant VM as SetOnboardingLanguageViewModel
    participant Repo as Language Repository
    participant Storage as Data Layer

    rect rgb(230,245,255)
      UI->>VM: Initialize ViewModel
      VM->>Repo: Subscribe to language stream
      Repo-->>VM: Emit current language
      VM-->>UI: Emit OnboardingLanguageState
    end

    rect rgb(235,255,230)
      UI->>VM: User selects language
      VM->>Storage: Persist selected language
      Storage-->>VM: Persist confirmation
      VM->>VM: Dispatch Internal(LoadLanguage) / disable onboarding flags
      VM-->>UI: Update OnboardingLanguageState (new language)
    end

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Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

• Pay attention to: subscription lifecycle and coroutine/scope handling in the ViewModel, persistence side effects for onboarding/first-time flags, and correctness of newly introduced state/event/action types.

Suggested reviewers

• Arinyadav1
• revanthkumarJ
• WizCoderr

Poem

🐰 I hopped in with a choice to share,
New tongues and flags handled with care,
State and action tidy and bright,
Onboarding users find their light,
Small steps, soft code — a language flight.

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title references MM-437 and mentions 'development_onboarding_doc', which aligns with the changes that add documentation (README) for onboarding language feature and ViewModel implementation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 19e91a4 and 758ecd3.

📒 Files selected for processing (1)

• feature/onboarding-language/README.md (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• feature/onboarding-language/README.md

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 768a6a6 and 19e91a4.

⛔ Files ignored due to path filters (1)

• docs/images/graphs/dep_graph_feature_onboarding_language.svg is excluded by !**/*.svg

📒 Files selected for processing (2)

• feature/onboarding-language/README.md (1 hunks)
• feature/onboarding-language/src/commonMain/kotlin/org/mifos/mobile/feature/onboarding/language/SetOnboardingLanguageViewModel.kt (3 hunks)

[Nagarjuna0033]

@SCHsebastian try ./gradlew spotlessApply and ./gradlew detekt and let me know I will approve.