Added missing repo config files that are present on main.

Author: paulmedynski

.azuredevops/policies/approvercountpolicy.yml

@@ -0,0 +1,26 @@
+# This file configures the Approver Count Policy Validator status check.  Some
+# settings here are similar to branch policies specified via the Azure DevOps UI
+# that govern how PRs are approved in general.  The settings here dictate how
+# the validator behaves, and it can also prevent PRs from completing.
+#
+# Suggested by Merlinbot (https://sqlclientdrivers.visualstudio.com/ADO.Net/_git/dotnet-sqlclient/pullrequest/4982)
+
+name: approver_count
+description: Approver count policy for dotnet-sqlclient
+resource: repository
+where: 
+configuration:
+  approverCountPolicySettings:
+    isBlocking: true
+    requireMinimumApproverCount: 2
+    creatorVoteCounts: false
+    allowDownvotes: false
+    sourcePushOptions:
+      resetOnSourcePush: false
+      requireVoteOnLastIteration: true
+      requireVoteOnEachIteration: false
+      resetRejectionsOnSourcePush: false
+    blockLastPusherVote: true
+    branchNames:
+    - internal/release/6.0
+    displayName: dotnet-sqlclient Approver Count Policy

.github/CODEOWNERS

@@ -0,0 +1,25 @@
+#==============================================================================
+# This is the global GitHub code owners file for the SqlClient repo.  No other
+# CODEOWNERS files should exist in the repo.
+#
+# Code owners documentation is here:
+#
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# The entire repo is owned by the SqlClientDevTeam GitHub team:
+#
+# https://github.com/orgs/dotnet/teams/sqlclientdevteam
+#
+# This team must be configured with write access to the repo for code ownership
+# rules to apply.
+#
+# The main branch should also be protected and require all PRs to be approved
+# by owners.  See:
+#
+# https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-protected-branches/about-protected-branches#require-pull-request-reviews-before-merging
+#
+# There should be no other owners specified in the repo.
+#
+* @dotnet/sqlclientdevteam
+
+#==============================================================================

azurepipelines-coverage.yml

@@ -0,0 +1,16 @@
+# Azure DevOps code coverage settings:
+#
+# https://learn.microsoft.com/en-us/azure/devops/pipelines/test/codecoverage-for-pullrequests?view=azure-devops#configuring-coverage-settings
+#
+coverage:
+  # Code coverage status will be posted to pull requests based on targets
+  # defined below.
+  status:
+    # Off by default. When on, details about coverage for each file changed will
+    # be posted as a pull request comment.
+    comments: on
+    # Diff coverage is code coverage only for the lines changed in a pull
+    # request.
+    diff:
+      # Set this to a desired %. Default is 70%.
+      target: 70%