Dev commit message guide

[SENya1990]

Changes Overview

There were new contribution attempts lately. Thus, I formalized the conventions I usually follow with Git branches and commits into text guidelines.

• Added guidelines for Git branches and commits
• Updated Contributing document with link to new guidelines

[Copilot]

Pull request overview

Formalizes internal Git workflow conventions (branch naming and commit/message practices) and updates contributor guidance to point to these docs, helping align new contributions with existing repo practices.

Changes:

• Added a new developer document describing branch naming, commit composition, and commit message conventions.
• Expanded CONTRIBUTING.md with contribution prerequisites and links to the coding + Git guidelines.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
docs/dev/CodingGuidelines/BranchAndCommitGuidelines.md	New documentation for branch naming and commit/message conventions.
CONTRIBUTING.md	Adds contribution prerequisites and links to the coding and Git guidelines docs.

Comments suppressed due to low confidence (1)

CONTRIBUTING.md:14

• Same issue as above: this HTML anchor is closed with "" instead of "". Consider replacing both links with standard Markdown links for consistency and correct rendering.

<a href="https://github.com/Acumatica/Acuminator/blob/dev/docs/dev/CodingGuidelines/BranchAndCommitGuidelines.md">
   Guidelines for working with Git branches and commits
<a/>

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