* d2ui: Add tooltip class
we reimplemented tooltips in several places
(inventory/skill_select_panel). Let's make it its own ui element.
* d2player: Refactor skill_select_panel to use the tooltip class
* d2player: Refactor inventory to use the tooltip class
* Make linter happy
* Make golangci-lint 1.27.0 happy as well
* tooltip: Remove const and rather disable linter
* removed the rest of the magic number errors from d2game
* hotfix for bug i added in map engine test
* removed TODO's from d2mapengine/engine.go, added link to github issue
* removed TODO's and made issues and other minor lint work
* lint cleanup, mostly removing TODO's and putting links to their issues on github
* d2game/d2player/inventory.go: magic number lint cleanup
* d2game/d2player/mini_panel.go: magic number lint cleanup
* d2game/d2player/skill_select_panel.go: lint cleanup
* d2game/d2player/skilltree.go: removed all lint errors
* removed the rest of the magic number errors from d2game
* hotfix for bug i added in map engine test
* all magic numbers removed (excluding mapgen)
* minor refactor of hero_stats_panel to clean up lint errors
* minor edit to skill_select_panel.go
* major refactor of d2game/d2player/game_controls.go, removed most lint errors.
- Clicking the active left/right skill now opens a skill select panel.
Only the available skills for the hero, which are valid for the panel type are shown.
Clicking on a skill from the skill select panel makes it the new active skill for the hero.
- Hovering a skill in the skill select panel shows the skill name +
skill description.
- New command which learns all skills for a specific
class(not persisted to a save file yet) - e.g. `learnskills ama` will learn
skills for the Amazon class.
- Initialize HeroSkill.shallowHeroSkill struct in the hero state factory, so we can use it
when we serialize the HeroSkill to packets/game save files.
- The parsed Skill.ListRow is now a number instead of string.
Co-authored-by: Presiyan Ivanov <presiyan-ivanov@users.noreply.github.com>