Kanban board (#8346)

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: jaqra <48099350+jaqra@users.noreply.github.com>
Co-authored-by: Kerry <flatline-studios@users.noreply.github.com>
Co-authored-by: Jaqra <jaqra@hotmail.com>
Co-authored-by: Kyle Evans <kevans91@users.noreply.github.com>
Co-authored-by: Tsakiridis Ilias <TsakiDev@users.noreply.github.com>
Co-authored-by: Ilias Tsakiridis <ilias.tsakiridis@outlook.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

options/locale/locale_en-US.ini

@@ -52,6 +52,8 @@ new_migrate = New Migration
 new_mirror = New Mirror
 new_fork = New Repository Fork
 new_org = New Organization
+new_project = New Project
+new_project_board = New Project board
 manage_org = Manage Organizations
 admin_panel = Site Administration
 account_settings = Account Settings
@@ -389,6 +391,7 @@ repositories = Repositories
 activity = Public Activity
 followers = Followers
 starred = Starred Repositories
+projects = Projects
 following = Following
 follow = Follow
 unfollow = Unfollow
@@ -757,6 +760,7 @@ branches = Branches
 tags = Tags
 issues = Issues
 pulls = Pull Requests
+project_board = Projects
 labels = Labels
 org_labels_desc = Organization level labels that can be used with <strong>all repositories</strong> under this organization
 org_labels_desc_manage = manage
@@ -858,9 +862,39 @@ commits.gpg_key_id = GPG Key ID
 ext_issues = Ext. Issues
 ext_issues.desc = Link to an external issue tracker.
 
+projects.create = Create Project
+projects.title = Title
+projects.new = New project
+projects.new_subheader = Coordinate, track, and update your work in one place, so projects stay transparent and on schedule.
+projects.desc = Description
+projects.create_success = The project '%s' has been created.
+projects.deletion = Delete Project
+projects.deletion_desc = Deleting a project removes it from all related issues. Continue?
+projects.deletion_success = The project has been deleted.
+projects.edit = Edit Projects
+projects.edit_subheader = Projects organize issues and track progress.
+projects.modify = Update Project
+projects.edit_success = Project '%s' has been updated.
+projects.type.none = "None"
+projects.type.basic_kanban = "Basic Kanban"
+projects.type.bug_triage = "Bug Triage"
+projects.template.desc = "Project template"
+projects.template.desc_helper = "Select a project template to get started"
+projects.type.uncategorized = Uncategorized
+projects.board.edit = "Edit board"
+projects.board.edit_title = "New Board Name"
+projects.board.new_title = "New Board Name"
+projects.board.new_submit = "Submit"
+projects.board.new = "New Board"
+projects.board.delete = "Delete Board"
+projects.board.deletion_desc = "Deleting a project board moves all related issues to 'Uncategorized'. Continue?"
+projects.open = Open
+projects.close = Close
+
 issues.desc = Organize bug reports, tasks and milestones.
 issues.filter_assignees = Filter Assignee
 issues.filter_milestones = Filter Milestone
+issues.filter_projects = Filter Project
 issues.filter_labels = Filter Label
 issues.filter_reviewers = Filter Reviewer
 issues.new = New Issue
@@ -869,6 +903,12 @@ issues.new.labels = Labels
 issues.new.add_labels_title = Apply labels
 issues.new.no_label = No Label
 issues.new.clear_labels = Clear labels
+issues.new.projects = Projects
+issues.new.add_project_title = Set Project
+issues.new.clear_projects = Clear projects
+issues.new.no_projects = No project
+issues.new.open_projects = Open Projects
+issues.new.closed_projects = Closed Projects
 issues.new.no_items = No items
 issues.new.milestone = Milestone
 issues.new.add_milestone_title = Set milestone
@@ -896,9 +936,13 @@ issues.label_templates.fail_to_load_file = Failed to load label template file '%
 issues.add_label_at = added the <div class="ui label" style="color: %s\; background-color: %s">%s</div> label %s
 issues.remove_label_at = removed the <div class="ui label" style="color: %s\; background-color: %s">%s</div> label %s
 issues.add_milestone_at = `added this to the <b>%s</b> milestone %s`
+issues.add_project_at = `added this to the <b>%s</b> project %s`
 issues.change_milestone_at = `modified the milestone from <b>%s</b> to <b>%s</b> %s`
+issues.change_project_at = `modified the project from <b>%s</b> to <b>%s</b> %s`
 issues.remove_milestone_at = `removed this from the <b>%s</b> milestone %s`
+issues.remove_project_at = `removed this from the <b>%s</b> project %s`
 issues.deleted_milestone = `(deleted)`
+issues.deleted_project = `(deleted)`
 issues.self_assign_at = `self-assigned this %s`
 issues.add_assignee_at = `was assigned by <b>%s</b> %s`
 issues.remove_assignee_at = `was unassigned by <b>%s</b> %s`
@@ -1374,6 +1418,7 @@ settings.pulls.allow_merge_commits = Enable Commit Merging
 settings.pulls.allow_rebase_merge = Enable Rebasing to Merge Commits
 settings.pulls.allow_rebase_merge_commit = Enable Rebasing with explicit merge commits (--no-ff)
 settings.pulls.allow_squash_commits = Enable Squashing to Merge Commits
+settings.projects_desc = Enable Repository Projects
 settings.admin_settings = Administrator Settings
 settings.admin_enable_health_check = Enable Repository Health Checks (git fsck)
 settings.admin_enable_close_issues_via_commit_in_any_branch = Close an issue via a commit made in a non default branch