docs: Update docs for latest loader & improve sections

[unrooot]

There have been a couple to the loader of changes over the past few months that modified the project initialization process and format. This PR updates those sections in the documentation as well as changing the wording in some sections to hopefully provide more clarity to new users for how to use the Loader and ServiceBag.

Notable changes:

• Updated or reworded section titles on most pages
• Fixed outdated loader information on the Install page
• "How ServiceBag works" renamed to "Using services in Nevermore"
  • Reorganized some sections to prioritize important info towards the top
  • Added example for clarity
• Changed the order of the pages to make it easier to read in order from start to finish
  • "Build" page renamed to "Contributing" and is the now last page in the list

I left design.md alone (besides updating the order) since it seemed mostly fine, with one exception: the "package types" section. It looked useful, however incomplete, so I wasn't able to assume what information should have been added there.

[github-actions[bot]]

:rocket: PR was released in @quenty/actionmanager@13.10.0, @quenty/adorneeboundingbox@8.10.0, @quenty/adorneedata@7.11.0, @quenty/adorneevalue@10.10.0, @quenty/animationprovider@11.8.0, @quenty/animations@8.10.0, @quenty/assetserviceutils@5.12.0, @quenty/attributeutils@14.10.0, @quenty/avatareditorutils@7.11.0, @quenty/basicpane@13.10.0, @quenty/binder@14.11.0, @quenty/bindtocloseservice@8.10.0, @quenty/blend@12.10.0, @quenty/bodycolorsutils@7.10.0, @quenty/boundlinkutils@14.11.0, @quenty/brio@14.10.0, @quenty/buttondragmodel@1.8.0, @quenty/buttonhighlightmodel@14.10.0, @quenty/camera@14.12.0, @quenty/characterutils@12.10.0, @quenty/chatproviderservice@9.14.0, @quenty/clienttranslator@14.11.0, @quenty/clipcharacters@12.11.0, @quenty/cmdrservice@13.12.0, @quenty/collectionserviceutils@8.10.0, @quenty/color3utils@11.10.0, @quenty/colorpalette@10.11.0, @quenty/colorpicker@10.11.0, @quenty/conditions@10.12.0, @quenty/contentproviderutils@12.10.0, @quenty/cooldown@11.12.0, @quenty/coreguienabler@12.10.0, @quenty/counter@7.10.0, @quenty/datastore@13.12.0, @quenty/deathreport@10.12.0, @quenty/depthoffield@11.11.0, @quenty/elo@7.11.0, @quenty/equippedtracker@13.10.0, @quenty/firstpersoncharactertransparency@14.11.0, @quenty/flipbook@9.10.0, @quenty/friendutils@12.10.0, @quenty/gameconfig@12.14.0, @quenty/gameproductservice@14.14.0, @quenty/gamescalingutils@13.10.0, @quenty/genericscreenguiprovider@13.12.0, @quenty/hide@11.12.0, @quenty/highlight@10.11.0, @quenty/hintscoringutils@14.12.0, @quenty/humanoidspeed@12.12.0, @quenty/humanoidtracker@13.10.0, @quenty/idleservice@13.13.0, @quenty/ik@15.14.0, @quenty/influxdbclient@7.12.0, @quenty/inputkeymaputils@14.13.0, @quenty/inputmode@13.11.0, @quenty/inputobjectutils@4.11.0, @quenty/instanceutils@13.10.0, @quenty/linkutils@13.10.0, @quenty/lipsum@14.10.0, @quenty/localizedtextutils@12.10.0, @quenty/motor6d@7.12.0, @quenty/multipleclickutils@13.10.0, @quenty/observablecollection@12.10.0, @quenty/particleengine@13.11.0, @quenty/parttouchingcalculator@14.11.0, @quenty/permissionprovider@14.12.0, @quenty/physicsutils@8.10.0, @quenty/playerbinder@14.11.0, @quenty/playerhumanoidbinder@14.11.0, @quenty/playerinputmode@9.12.0, @quenty/playerutils@8.10.0, @quenty/promptqueue@1.9.0, @quenty/propertyvalue@7.10.0, @quenty/r15utils@13.10.0, @quenty/racketingropeconstraint@12.12.0, @quenty/radial-image@9.10.0, @quenty/ragdoll@15.13.0, @quenty/receiptprocessing@7.11.0, @quenty/remoting@12.11.0, @quenty/resetservice@11.12.0, @quenty/rigbuilderutils@10.12.0, @quenty/rogue-humanoid@10.12.0, @quenty/rogue-properties@11.12.0, @quenty/rx@13.10.0, @quenty/rxbinderutils@14.11.0, @quenty/rxsignal@7.10.0, @quenty/scoredactionservice@16.14.0, @quenty/screenshothudservice@7.11.0, @quenty/seatutils@7.11.0, @quenty/secrets@7.13.0, @quenty/selectionutils@8.10.0, @quenty/settings-inputkeymap@10.15.0, @quenty/settings@11.13.0, @quenty/snackbar@11.12.0, @quenty/softshutdown@9.13.0, @quenty/soundgroup@1.10.0, @quenty/soundplayer@7.11.0, @quenty/spawning@10.12.0, @quenty/sprites@13.9.0, @quenty/statestack@14.11.0, @quenty/teamtracker@13.10.0, @quenty/teamutils@10.10.0, @quenty/teleportserviceutils@9.10.0, @quenty/templateprovider@11.8.0, @quenty/textboxutils@7.10.0, @quenty/textfilterservice@13.11.0, @quenty/textserviceutils@13.10.0, @quenty/tie@10.12.0, @quenty/timedtween@7.10.0, @quenty/timesyncservice@13.11.0, @quenty/transitionmodel@7.11.0, @quenty/uiobjectutils@6.9.0, @quenty/undostack@7.10.0, @quenty/userserviceutils@9.11.0, @quenty/valuebaseutils@13.10.0, @quenty/valueobject@13.10.0, @quenty/viewport@11.13.0 :rocket: