docs: add contributor starter checklist and good-first-issue template

.github/ISSUE_TEMPLATE/good_first_issue.yml

@@ -0,0 +1,46 @@
+name: "Good first issue"
+about: "A small, self-contained task suitable for new contributors. Follow the steps and submit a small PR."
+title: "Good first issue: [short description]"
+labels: ["good first issue", "help wanted"]
+assignees: []
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for helping! This template describes a small task that is suitable for a new contributor.
+  - type: input
+    id: description
+    attributes:
+      label: "What needs to be done?"
+      description: "Provide a concise description of the change required and why."
+      placeholder: "Add examples to README for X; implement unit tests for Y; fix typo in Z."
+      required: true
+  - type: input
+    id: acceptance_criteria
+    attributes:
+      label: "Acceptance criteria"
+      description: "List the checks that will show the task is complete (tests, example run, docs updated)."
+      placeholder: "1) README has code example; 2) Tests pass on CI"
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: "Suggested steps"
+      description: "Optional step-by-step guidance for contributors."
+      placeholder: "1) Fork repo; 2) Create branch; 3) Make changes; 4) Run tests; 5) Open PR."
+      required: false
+  - type: dropdown
+    id: difficulty
+    attributes:
+      label: "Difficulty"
+      options:
+        - "low"
+        - "medium"
+        - "high"
+      description: "Estimate the difficulty for this task."
+      required: true
+  - type: input
+    id: related_issues
+    attributes:
+      label: "Related issues or references"
+      required: false

CONTRIBUTING.md

@@ -1,5 +1,7 @@
 ## How to contribute?
 
+Looking for contributors: This repository and related organizations are seeking contributors for project setup, documentation, CI, tests, and small features. See issue #7546 for the full invitation and list of organizations: https://github.com/TheAlgorithms/Java/issues/7546
+
 NOTE: *We DO NOT add leetcode problems. They are just applications of basic principles that can be found in other algorithms included in the repository.*
 
 ### Did you find a bug?

CONTRIBUTOR_STARTER.md

@@ -0,0 +1,30 @@
+Contributor starter template
+
+This small template provides minimal files and guidance that can be used to initialize a new repository or provide a starter PR for an empty project.
+
+Suggested files to add in a starter PR:
+- README.md: Short project description, purpose, quick start, and how to contribute.
+- CONTRIBUTING.md: Minimal contribution flow (fork -> branch -> PR), coding style notes, testing instructions.
+- .github/ISSUE_TEMPLATE/good_first_issue.yml: Template for small tasks for new contributors (already added here).
+- LICENSE: e.g., MIT or Apache-2.0.
+- .github/workflows/build.yml: Basic CI to run tests on push/PR (optional).
+
+Quick README example:
+
+# ProjectName
+
+Short one-line description.
+
+## Getting started
+
+1. Fork the repository
+2. Build with: mvn -q -DskipTests package
+3. Run tests: mvn -q test
+
+## Contributing
+
+See CONTRIBUTING.md and look for issues labeled `good first issue`.
+
+---
+
+Use this file as a checklist when opening an initial "starter" PR for a new repo. Keep the PR small and focused on onboarding (docs + ci), not large feature work.

README.md

@@ -16,5 +16,7 @@ These implementations are intended for learning purposes. As such, they may be l
 ## Contribution Guidelines
 Please read our [Contribution Guidelines](CONTRIBUTING.md) before you contribute to this project.
 
+Looking for contributors? See issue #7546 — [Contributors Wanted for New Open-Source Projects](https://github.com/TheAlgorithms/Java/issues/7546) for details and ways to get involved.
+
 ## Algorithms
 Our [directory](DIRECTORY.md) has the full list of applications.